Peter Steinfeld: Hailee Steinfeld’s Father and Life in 2026

Peter Steinfeld is an American celebrity fitness trainer, businessman, and fitness consultant best known as the father of Hollywood actress and singer Hailee Steinfeld. Also known as Pete Steinfeld, he has spent decades helping people improve their fitness through personalized training programs. His professional experience includes working with famous entertainers such as Madonna, Ozzy Osbourne, Glenn Frey, and Larry David.

Although many people recognize Peter through his daughter’s successful entertainment career, he established himself in the fitness industry long before Hailee became famous. He founded Better Shape-Up, a personal training company, in 1990. He also developed experience in fitness equipment, nutrition guidance, and health-related business projects. According to People magazine’s profile of Hailee Steinfeld’s parents, Peter has played an important role in preparing his daughter for demanding acting roles and live performances.

Today, in 2026, Peter Steinfeld remains closely connected to his family and the fitness industry. His daughter is married to Buffalo Bills quarterback Josh Allen, and Peter became a grandfather when the couple welcomed their first child in April 2026. His story combines professional achievement, family support, and a lifelong commitment to physical fitness.

Peter Steinfeld Biography and Quick Facts

Peter Steinfeld’s Early Life in New York

Peter Steinfeld comes from a family with roots in New York.

His early years were connected to Brooklyn, where members of the Steinfeld family grew up.

However, detailed information about his birth date, parents, and childhood is not widely documented in authoritative public sources.

He later moved to California, where he developed his professional career.

The move became an important turning point.

California offered opportunities in entertainment, fitness, and business.

Peter eventually combined these industries through personal training.

How Old Is Peter Steinfeld in 2026?

Peter Steinfeld’s exact age has not been independently confirmed.

Several online biographies publish estimated birth years, but the information is inconsistent.

His brother, Jake Steinfeld, was born on February 21, 1958.

However, Jake’s birthday cannot be used to determine Peter’s exact age.

Peter has not made a widely documented public announcement establishing his date of birth.

For this reason, his precise age in 2026 remains unknown.

Peter Steinfeld Moved to California in 1978

Peter relocated to California with his family in 1978.

The move helped him explore opportunities beyond his New York background.

He eventually attended California State University, Northridge.

There, he studied business and nutrition.

These subjects became important to his future career.

Studying Business and Nutrition

Business education helps people understand company management, marketing, and financial planning.

Nutrition focuses on food, nutrients, and their relationship with health.

Together, these subjects can provide a foundation for developing a fitness-related business.

Peter later applied his knowledge to personal training.

He became interested in helping clients improve their physical condition through exercise and lifestyle changes.

His professional approach included more than selecting workouts.

He also emphasized consistency, motivation, and practical habits.

Peter Steinfeld Started His Fitness Career

Peter entered the fitness industry during a period when personal training was becoming increasingly popular.

More people were becoming interested in individualized workout programs.

Celebrities also began hiring trainers to help them prepare for performances and maintain their physical condition.

Peter developed professional skills in this expanding industry.

Building Experience as a Trainer

Personal trainers create exercise programs based on individual goals.

Some clients want to improve strength.

Others focus on cardiovascular fitness, mobility, or physical conditioning.

A trainer must understand the client’s needs before recommending suitable exercises.

Peter developed experience working with people who had different schedules and fitness goals.

His professional reputation eventually helped him attract entertainment-industry clients.

The Importance of Motivation

Peter has emphasized that fitness involves both physical and mental commitment.

A successful workout program requires consistency.

However, people sometimes struggle to maintain routines because of work, travel, or family responsibilities.

Peter’s approach includes encouraging clients to remain committed.

He also tries to simplify exercise programs.

Rather than relying entirely on complicated equipment, he focuses on practical methods suited to the individual.

Peter Steinfeld Founded Better Shape-Up in 1990

One of Peter’s most important professional achievements was establishing Better Shape-Up.

He founded the personal fitness training company in 1990.

The business focused on helping clients improve their health through exercise and motivation.

Its services combined physical training with guidance related to healthy habits.

What Is Better Shape-Up?

Better Shape-Up is associated with personalized fitness programs.

Peter developed training methods intended to help clients improve strength and physical conditioning.

His approach also included nutrition-related guidance and motivation.

The company attracted clients connected to the entertainment industry.

This helped Peter establish a reputation as a celebrity fitness trainer.

Why the Business Was Important

Launching a fitness business requires more than understanding exercise.

Owners must manage schedules, clients, finances, and operations.

Peter’s education in business and nutrition was relevant to these responsibilities.

He also developed relationships with people in Hollywood.

Over time, these connections helped expand his professional opportunities.

Better Shape-Up became the central business associated with his name.

Peter Steinfeld Trained Hollywood Celebrities

Peter became known for working with established entertainers.

His reported client list includes Madonna, Ozzy Osbourne, Glenn Frey, and Larry David.

These performers worked in different parts of the entertainment industry.

Their professional schedules often involved travel, rehearsals, recording sessions, and public appearances.

Training Madonna

Madonna is internationally recognized for her music and energetic live performances.

Her career has included demanding stage productions.

Peter’s professional biography identifies her among his celebrity fitness clients.

However, detailed information about every workout or training period is not publicly available.

It would therefore be inaccurate to claim that he designed all of her fitness routines.

His connection to Madonna remains part of his documented client history.

Working With Ozzy Osbourne

Peter has also been associated with musician Ozzy Osbourne.

Ozzy became famous as the lead singer of Black Sabbath before establishing a successful solo career.

He also appeared with his family on the reality television series The Osbournes.

Peter’s professional background includes television exposure connected to celebrity fitness.

His work with Ozzy added another recognizable name to his client list.

Glenn Frey and Larry David

Peter also reportedly trained Glenn Frey, the musician known for his work with the Eagles.

Another client was Larry David, co-creator of Seinfeld and star of Curb Your Enthusiasm.

Working with people from music and television demonstrated the variety of his clientele.

However, these professional relationships should not be confused with personal friendships unless confirmed.

Peter’s established role was that of a fitness professional.

Peter Steinfeld’s Connection to Jake Steinfeld

Peter’s brother is Jake Steinfeld, the well-known fitness entrepreneur associated with the Body by Jake brand.

Jake became famous for helping popularize personal training.

He developed television programs, exercise products, and fitness businesses.

His career includes appearances in movies and television.

Who Is Jake Steinfeld?

Jake Steinfeld was born on February 21, 1958.

He grew up in New York before relocating to California.

He became recognized for promoting physical fitness through television and consumer products.

His Body by Jake brand gained national attention.

Jake also launched fitness media businesses.

His work helped introduce exercise programs to audiences who wanted to train at home.

Two Brothers in the Fitness Industry

Peter and Jake developed careers involving personal fitness.

However, they established separate professional identities.

Jake became widely known through television and consumer fitness products.

Peter concentrated on personalized training and direct work with clients.

Their shared interest in exercise helped make fitness an important part of the Steinfeld family.

Peter later introduced similar values to his children.

Peter Steinfeld Married Cheri Domasin

Peter Steinfeld is married to Cheri Domasin Steinfeld.

The couple married in 1992.

Their relationship has continued for more than three decades.

Cheri has a professional background in interior design.

She has also worked in cosmetology and as a flight attendant.

Later, she became involved in managing their daughter Hailee’s entertainment career.

Who Is Cheri Steinfeld?

Cheri is an American interior designer.

Her background includes creative work and family management.

She became widely recognized after Hailee achieved success in Hollywood.

However, Cheri maintained her own professional identity before her daughter’s acting breakthrough.

Her experience with design and presentation contributed to the family’s creative environment.

A Partnership That Supports Their Children

Peter and Cheri have played important roles in their children’s lives.

They encouraged education, discipline, and professional commitment.

Cheri became closely involved in Hailee’s acting opportunities.

Peter helped her develop physical fitness and confidence.

Their different skills provided support as Hailee entered the entertainment industry.

In 2026, the couple have been married for approximately 34 years.

Peter Steinfeld Has Two Children

Peter and Cheri have two children.

Their older child is Griffin Steinfeld.

Their younger child is Hailee Steinfeld.

Both pursued careers requiring discipline and specialized skills.

However, their professional interests developed in different directions.

Griffin Steinfeld

Griffin Steinfeld is Peter’s eldest child.

He developed an interest in motorsports and automobile racing.

He has participated in racing competitions and worked on automotive-related projects.

His professional background also includes business activities.

Griffin has generally maintained a lower entertainment profile than his younger sister.

However, he has occasionally appeared in family photographs and public celebrations.

Hailee Steinfeld

Hailee Steinfeld was born on December 11, 1996, in Los Angeles, California.

She began acting during childhood.

Her breakthrough came through the 2010 film True Grit.

The movie earned her an Academy Award nomination for Best Supporting Actress.

She was only 14 years old when she received the nomination.

Her performance introduced her to international audiences.

Hailee later developed careers in both acting and music.

Peter Supported Hailee Steinfeld’s Acting Career

Peter played an important role in helping his daughter manage the physical demands of entertainment.

Although Cheri became closely involved in Hailee’s professional management, Peter provided fitness guidance.

As Hailee’s career expanded, she began working on movies and television programs requiring different levels of physical preparation.

Her father helped her maintain exercise routines.

A Father Who Is Also a Trainer

Hailee has described Peter as both her father and her personal trainer.

She has joked that their relationship changes when they enter the gym.

At home, he is her dad.

During workouts, he becomes a demanding professional trainer.

This distinction helps explain their unusual working relationship.

Peter understands Hailee’s physical abilities and professional requirements.

He can adjust her training depending on the project.

Hailee’s View of Her Father

Hailee has publicly praised Peter’s expertise.

She has described him as one of her closest friends.

She also explained that working with him is challenging but enjoyable.

Their relationship demonstrates the connection between professional training and family support.

However, it would be inaccurate to assume that every workout is easy simply because they are related.

Hailee has said that her father pushes her to work hard.

Peter Trained Hailee for Hawkeye

One of Peter’s most recognizable professional contributions involved preparing Hailee for the Marvel television series Hawkeye.

The show premiered on Disney+ in November 2021.

Hailee played Kate Bishop, a talented young archer.

The series also starred Jeremy Renner as Clint Barton.

Kate becomes involved in dangerous situations requiring physical strength, coordination, and endurance.

Preparing for an Action Role

Playing an action character can require extensive physical preparation.

Actors may need to perform fight choreography, stunt-related movements, and demanding scenes.

Hailee worked with her father to improve her conditioning.

Their preparation included strength training and other exercises.

She has also discussed learning combat-related skills for the role.

Why the Training Was Important

Kate Bishop is portrayed as an athletic character.

She uses archery and martial arts while confronting dangerous opponents.

The performance required Hailee to move confidently during action sequences.

Peter helped her develop the physical conditioning needed for filming.

However, stunt coordinators and other specialists also contribute to action productions.

Peter’s role was part of Hailee’s broader preparation.

Their Fitness Routine

In interviews, Hailee has described doing circuit training and cardio with her father.

Circuit training typically involves completing several exercises in sequence.

It can help improve cardiovascular fitness and muscular endurance.

Their workouts varied depending on her schedule and goals.

Peter also helped simplify complicated training ideas.

Rather than focusing only on trendy exercises, he considered what would be practical and effective for the specific objective.

Peter Steinfeld’s Fitness Philosophy

Peter’s training approach emphasizes consistency and individual needs.

He has discussed the importance of making workouts understandable.

Many people become discouraged when exercise programs appear too complicated.

Peter encourages simpler approaches.

Fitness Is Not Only About Appearance

Personal training can involve different goals.

Some clients want to build strength.

Others want to improve mobility, endurance, or overall physical well-being.

Peter has described wanting clients to feel better after working with him.

His public comments suggest that personal confidence is an important part of his approach.

This philosophy also appears in how Hailee discusses exercise.

She often describes working out as a way to support both physical and mental well-being.

Training Around a Busy Schedule

Hailee’s entertainment career includes filming, recording music, rehearsals, and traveling.

These activities can make regular exercise difficult.

Peter has helped her organize workouts around different professional commitments.

According to Hailee, he adjusts training plans depending on the available time.

For example, a film role may require different preparation from a concert tour.

His approach reflects the flexibility needed when working with performers.

Peter Steinfeld’s Unusual Workout Schedule

In August 2025, Peter attracted attention after Hailee featured him in her Beau Society newsletter.

He discussed his personal workout habits.

One particularly surprising detail was his preferred training time.

Peter explained that he sometimes exercises at one o’clock in the morning.

Why Does Peter Exercise So Early?

Peter described enjoying the quiet environment.

At that hour, he can focus without interruptions.

He also prefers working out without music.

For him, exercise provides an opportunity for concentration.

His routine attracted interest because most people prefer training during daytime hours.

However, his personal schedule is not necessarily suitable for everyone.

The best exercise routine depends on individual sleep, health, and work requirements.

A Disciplined Approach

Peter has described himself as disciplined.

He values consistency and focused effort.

These habits have contributed to his long professional career.

However, readers should not assume that exercising at unusual hours automatically improves fitness results.

Peter’s routine reflects his personal preference rather than a universal recommendation.

Peter Steinfeld Has Appeared on Television

Although Peter is primarily known as a trainer, he has also participated in entertainment-related projects.

His professional biography describes appearances on fitness and shopping television programs.

These include QVC, the Home Shopping Network, and The Osbournes.

He also has experience presenting fitness products and exercise ideas.

His Role in Hailee’s Most Girls Music Video

Peter appeared in Hailee’s music video for “Most Girls.”

The song was released in 2017.

Its message focuses on confidence and celebrating different expressions of womanhood.

The video features several settings and characters.

Peter’s appearance provided a small family connection to the production.

Fitness and Television

Television appearances gave Peter opportunities to introduce exercise ideas to wider audiences.

However, he did not become a full-time Hollywood actor.

His primary career remained connected to personal training.

His entertainment appearances should therefore be understood as additional professional experiences rather than his main occupation.

Peter Steinfeld’s Work With Fitness Technology

Peter has also been involved in fitness-related business development.

His professional background includes consulting on exercise equipment.

He has participated in projects designed to help people monitor physical activity.

The Bodybugg Project

In 2005, Peter worked with Apex Fitness and BodyMedia on a project involving the bodybugg calorie-monitoring device.

The technology was designed to help users estimate their energy expenditure.

At the time, wearable fitness technology was becoming increasingly popular.

Devices that tracked physical activity offered new ways for people to monitor exercise habits.

Combining Technology With Coaching

Peter’s involvement reflected his interest in combining technology with personal motivation.

Fitness devices can provide information.

However, they do not automatically create healthy routines.

People still need to understand their goals and make practical decisions.

Peter’s professional approach emphasized combining information with coaching.

This became another example of his work beyond traditional gym training.

Peter Steinfeld Became Josh Allen’s Father-in-Law

Another important family development occurred when Hailee began dating NFL quarterback Josh Allen.

Josh plays for the Buffalo Bills.

He is known for his passing ability, athleticism, and leadership on the football field.

Hailee and Josh became publicly linked in May 2023.

Their relationship later became more serious.

Hailee and Josh Got Engaged in 2024

The couple announced their engagement in November 2024.

Josh proposed during the NFL season’s bye week.

The announcement attracted considerable attention from sports and entertainment publications.

Peter and Cheri became connected to the Allen family through the engagement.

Their Wedding in May 2025

Hailee and Josh married on May 31, 2025.

Their wedding took place in Santa Barbara, California.

Family members and close friends attended the ceremony.

The couple chose a celebration where guests were encouraged to remain present rather than use their phones.

The wedding marked an important milestone for the Steinfeld family.

Peter officially became Josh Allen’s father-in-law.

Peter Steinfeld Became a Grandfather in 2026

One of the biggest recent changes in Peter’s personal life occurred in April 2026.

Hailee and Josh welcomed their first child.

They announced the birth of a daughter.

Later, they revealed that her name was Harper Haize Allen.

Welcoming Harper Haize Allen

Hailee announced her daughter’s birth on April 2, 2026.

The announcement appeared through her Beau Society newsletter.

She later shared additional reflections about becoming a mother.

The birth created a new generation in the family.

For Peter and Cheri, it meant becoming grandparents.

The Steinfeld Family in 2026

Peter’s family now includes his wife Cheri, their two adult children, son-in-law Josh Allen, and granddaughter Harper.

However, Peter has not publicly shared extensive details about his role as a grandfather.

There is no reliable basis for describing his daily involvement in childcare.

The documented milestone is that Hailee and Josh welcomed their daughter in 2026.

The family generally maintains privacy around the child’s everyday life.

Peter Steinfeld’s Net Worth in 2026

Peter has spent decades working in the fitness industry.

His professional activities include personal training, business ownership, fitness equipment consulting, and television appearances.

He has also worked with established entertainment clients.

However, his exact personal net worth has not been independently verified.

Does Peter Have a Successful Business?

Peter founded Better Shape-Up in 1990.

The company became associated with celebrity training and fitness guidance.

However, its complete current financial records are not publicly available.

There is no reliable information establishing Peter’s exact business income in 2026.

Is He Wealthy Because of Hailee?

Hailee has earned substantial income through acting, music, and endorsements.

However, her professional wealth should not be confused with her father’s finances.

Peter established his career long before her Hollywood breakthrough.

His personal savings, investments, property holdings, and business ownership values remain private.

Therefore, Peter Steinfeld’s exact net worth in 2026 is not publicly confirmed.

What Is Peter Steinfeld Doing in 2026?

As of November 2026, Peter remains publicly associated with fitness training and his family’s entertainment activities.

His most clearly documented recent professional comments came through Hailee’s 2025 newsletter.

There, he discussed training routines and his personal approach to exercise.

He continues to be recognized for his work as a celebrity personal trainer.

However, his exact current client list and daily business schedule have not been independently verified.

Does He Still Train Hailee?

Hailee has repeatedly described working with her father.

Their professional relationship has continued across different stages of her career.

However, there is no recent public statement establishing that Peter personally supervises every workout she completes in late 2026.

Their training arrangements may change depending on professional commitments and family responsibilities.

What is established is that Peter has played a significant role in her fitness development.

His Life Beyond the Gym

Peter’s family experienced important milestones during 2025 and 2026.

Hailee married Josh Allen in 2025.

The couple welcomed a daughter in 2026.

Meanwhile, Peter remains recognized for his decades of work in personal fitness.

He has generally maintained a more private lifestyle than his internationally famous daughter.

Interesting Facts About Peter Steinfeld

• Peter Steinfeld is also known as Pete Steinfeld.

• He is the father of actress and singer Hailee Steinfeld.

• His wife is interior designer Cheri Steinfeld.

• The couple married in 1992.

• They have two children, Griffin and Hailee.

• Peter moved to California in 1978.

• He studied business and nutrition at California State University, Northridge.

• He founded Better Shape-Up in 1990.

• His celebrity clients have included Madonna, Ozzy Osbourne, Glenn Frey, and Larry David.

• His brother is fitness entrepreneur Jake Steinfeld.

• Peter helped prepare Hailee for her role as Kate Bishop in Hawkeye.

• He appeared in Hailee’s “Most Girls” music video.

• He has been involved in fitness technology and equipment consulting.

• He sometimes trains at one o’clock in the morning.

• He became Josh Allen’s father-in-law in 2025.

• He became a grandfather after Hailee welcomed her daughter in April 2026.

Why Peter Steinfeld’s Story Attracts Attention

Peter’s name attracts interest because of Hailee’s growing entertainment career.

She became an Academy Award nominee while still a teenager.

Later, she established herself as a singer and appeared in major productions such as Bumblebee, The Edge of Seventeen, Hawkeye, and Sinners.

As audiences learn more about her, they become curious about the people who supported her success.

Peter played an important role in her physical preparation.

However, his own professional history is also substantial.

He founded a fitness business, trained famous entertainers, and developed experience in health-related products.

His story demonstrates that celebrity parents can have established careers independent of their children’s achievements.

Final Thoughts

Peter Steinfeld has spent decades developing a career built around physical fitness, motivation, and personal training.

After moving to California in 1978, he studied business and nutrition.

He eventually entered the fitness industry and founded Better Shape-Up in 1990.

His work introduced him to famous entertainers such as Madonna, Ozzy Osbourne, Glenn Frey, and Larry David.

However, one of his most meaningful professional relationships has been with his daughter, Hailee Steinfeld.

Peter helped her develop fitness routines for performing, touring, and demanding acting roles.

He also supported her as she became an internationally recognized actress and singer.

In 2026, Peter remains married to Cheri Steinfeld and is now a grandfather following the birth of Hailee and Josh Allen’s daughter.

Although his exact age and personal finances remain private, his professional achievements are well documented.

His journey shows how discipline, business experience, and family support can become important parts of a long-lasting career.

Frequently Asked Questions About Peter Steinfeld

1. Who is Peter Steinfeld?

Peter Steinfeld is an American personal trainer, fitness entrepreneur, and consultant. He is best known as the father of actress and singer Hailee Steinfeld.

2. How old is Peter Steinfeld in 2026?

Peter Steinfeld’s exact birthday and age have not been reliably established through authoritative public sources.

3. Who is Peter Steinfeld married to?

Peter is married to Cheri Steinfeld, an interior designer. They married in 1992.

4. How many children does Peter Steinfeld have?

Peter and Cheri have two children: Griffin Steinfeld and Hailee Steinfeld.

5. Is Peter Steinfeld related to Jake Steinfeld?

Yes. Jake Steinfeld, the fitness entrepreneur behind Body by Jake, is Peter’s brother.

6. What does Peter Steinfeld do for a living?

Peter is a personal fitness trainer and entrepreneur. He founded Better Shape-Up in 1990 and has worked with numerous entertainment clients.

7. Did Peter Steinfeld train Hailee for Hawkeye?

Yes. Peter helped Hailee prepare physically for her role as Kate Bishop in Marvel’s Hawkeye.

8. Who are Peter Steinfeld’s famous clients?

His reported celebrity clients include Madonna, Ozzy Osbourne, Glenn Frey, and Larry David.

9. Is Josh Allen Peter Steinfeld’s son-in-law?

Yes. Josh Allen married Peter’s daughter Hailee Steinfeld on May 31, 2025.

10. Does Peter Steinfeld have grandchildren?

Yes. Hailee Steinfeld and Josh Allen welcomed their daughter, Harper Haize Allen, in April 2026.

For more celebrity biographies, family stories, and entertainment updates, visit Villy Magazine.