Milaine Desaulniers: Biography, Age, Parents, Sister, Career, Net Worth and Personal Life

Milaine Desaulniers is an American mathematics educator and occasional film performer who is best known as the younger sister of Academy Award-winning actress Brie Larson. Although her older sister has achieved international fame through successful Hollywood films, Milaine has followed a different professional path, focusing primarily on education, student development, and academic leadership.

Born in 1993, Milaine grew up in California in a family that experienced both financial difficulties and significant changes during her childhood. Her parents, Heather and Sylvain Desaulniers, were chiropractors, and her older sister began pursuing acting opportunities at a young age. After her parents separated, Milaine moved with her mother and sister to the Los Angeles area, where the family supported Brie’s early entertainment career.

Unlike many celebrity relatives who pursue public recognition, Milaine Desaulniers has maintained a relatively private life. Her professional activities have been associated with mathematics teaching and student leadership at California high schools. She has also worked on creative projects, including the short film The Arm, which Brie Larson co-directed.

Although public information about her relationships, finances, and everyday life remains limited, her background continues to interest people who want to learn more about Brie Larson’s family.

This article explores Milaine Desaulniers’ biography, age, childhood, parents, educational background, career, relationship with Brie Larson, net worth, and personal life.

Who Is Milaine Desaulniers?

Milaine Desaulniers is the younger sister of American actress Brie Larson, whose birth name is Brianne Sidonie Desaulniers. She is also known as Mimsy Desaulniers, a name that appears in professional education directories and entertainment credits.

While Brie Larson became famous for movies such as Room, Captain Marvel, and The Marvels, Milaine developed a professional identity outside mainstream entertainment.

She has worked as a mathematics teacher and Associated Student Body (ASB) director. These roles involve teaching and supporting students through leadership programs, school activities, and community-building projects.

Her public recognition largely comes from her relationship with Brie Larson. However, her work in education and limited film appearances demonstrate that her personal journey extends beyond her famous family connection.

Milaine Desaulniers Biography and Quick Facts

Personal Details	Information
Full name	Raya Milaine Desaulniers (reported)
Popular name	Milaine Desaulniers
Other name	Mimsy Desaulniers
Reported date of birth	January 5, 1993
Age	33 years old as of 2026, based on reported birth date
Birthplace	Sacramento, California, United States (reported)
Nationality	American
Profession	Mathematics teacher and student activities director
Father	Sylvain Desaulniers
Mother	Heather Desaulniers
Famous sister	Brie Larson
Known film appearance	The Arm (2012)
Marital status	Not publicly confirmed
Net worth	Not publicly verified
Known for	Being Brie Larson’s younger sister and working in education

Online databases report some biographical details, including Milaine’s exact birthday, but no authoritative primary documents have independently established them.

Milaine Desaulniers Age and Birthday

Online databases report that Milaine Desaulniers was born on January 5, 1993, in Sacramento, California. Based on this date, she is 33 years old as of October 2026.

Her older sister, Brie Larson, was born on October 1, 1989, making Brie approximately three years older.

Although the year 1993 is supported by established entertainment reporting about the Desaulniers family, Milaine’s exact birth date appears mainly in online biographical databases.

Because Milaine rarely discusses her private life publicly, few firsthand sources document her birthdays, celebrations, or personal milestones.

Milaine Desaulniers Early Life and Childhood

Milaine Desaulniers spent her early childhood in California with her parents and older sister.

Her family’s circumstances changed when her parents separated. At the time, Brie Larson was still a child and had already demonstrated an interest in acting.

Their mother, Heather Desaulniers, decided to support Brie’s ambitions by relocating with her daughters to the Los Angeles area.

According to an interview published by ELLE, Heather moved to Los Angeles with Brie and her younger sister, Mimsy, while the family had limited financial resources.

They initially stayed in a furnished studio apartment in Burbank, an area known for its connection to television and film production.

The move represented an important turning point for the family. Brie began pursuing professional acting opportunities while Heather worked to support both daughters.

Although Milaine has not publicly described every aspect of her childhood, the family’s experiences provide important context for understanding her upbringing.

Growing up near Hollywood also meant that Milaine became familiar with the entertainment industry long before her sister achieved international recognition.

Milaine Desaulniers Parents and Family Background

Milaine Desaulniers was born to Sylvain Desaulniers and Heather Desaulniers. Both parents worked in chiropractic care and previously operated a practice together.

Her family has French-Canadian connections through her father’s side.

Father: Sylvain Desaulniers

Sylvain Desaulniers is Milaine’s father and Brie Larson’s father.

He comes from a French-Canadian background, which contributed to the family’s cultural heritage. Brie has said she grew up with French as her first language.

Sylvain worked as a chiropractor during his daughters’ childhood.

After separating from Heather, he maintained a relatively private public profile. Detailed information about his later professional activities and personal life is limited.

Mother: Heather Desaulniers

Heather Desaulniers played a significant role in raising Milaine and Brie.

After separating from Sylvain, she relocated with her daughters to Southern California so Brie could pursue acting.

The family’s early years in Los Angeles were financially challenging. Nevertheless, Heather continued to support her children and encourage their interests.

Her influence is frequently mentioned in interviews about Brie’s childhood and early Hollywood career.

For Milaine, Heather was also an important figure during the family’s relocation and transition to life in the Los Angeles area.

Milaine Desaulniers and Brie Larson

One of the most frequently searched topics about Milaine Desaulniers is her relationship with her older sister, Brie Larson.

Brie Larson is an internationally recognized actress who gained critical acclaim for her independent film performances before becoming a major Hollywood star.

Her career reached an important milestone when she won the Academy Award for Best Actress for her performance in the 2015 drama Room.

She later became widely known for portraying Carol Danvers, also known as Captain Marvel, in the Marvel Cinematic Universe.

Despite their different careers, the sisters have shared several publicly documented interests and experiences.

During an interview about the Nintendo game Animal Crossing, Brie said she played it with her sister when they were younger.

Their mother reportedly encouraged the girls to finish their homework by letting whoever finished first play the game first.

Years later, the release of Animal Crossing: New Horizons gave the sisters another chance to connect through gaming.

This childhood tradition offers an interesting glimpse into their family relationship beyond Hollywood appearances and entertainment headlines.

Milaine Desaulniers Education and Academic Background

Milaine Desaulniers has established a career in education, particularly mathematics instruction.

Her work as a teacher suggests a strong professional interest in academic development and helping students understand mathematical concepts.

Some online professional profiles associate her with university-level study in California. However, her complete educational history and qualifications have not been independently confirmed through official university records.

Therefore, it is more accurate to focus on her documented teaching positions than to present uncertain academic credentials as facts.

Teaching mathematics requires subject knowledge, instructional planning, communication skills, and an ability to help students develop problem-solving techniques.

Milaine’s additional involvement in student activities also shows that her responsibilities have extended beyond traditional classroom teaching.

Milaine Desaulniers Teaching Career

Milaine Desaulniers has worked in California secondary education under the name Mimsy Desaulniers.

One of the clearest examples of her professional work comes from Valencia High School, where she was identified as a mathematics teacher and Associated Student Body director.

In February 2020, The Santa Clarita Valley Signal reported on a school initiative organized by Valencia High School’s ASB students.

The students decorated the campus with paper hearts containing names and encouraging messages. The activity was intended to make students feel recognized and appreciated during Valentine’s Day.

Mimsy Desaulniers was quoted in the report discussing the initiative and its goal of encouraging kindness.

The project demonstrated her involvement in student leadership and school community activities.

Canyon High School’s staff directory has also listed Mimsy Desaulniers as an ASB director and mathematics teacher.

These professional records show that education is one of the most consistently documented aspects of her adult life.

Her responsibilities combine classroom teaching with support for student organizations and school activities.

Milaine Desaulniers Movies and Acting Career

Although education is Milaine Desaulniers’ primary documented professional field, she has also worked in entertainment.

Her most recognizable acting credit is the 2012 short film The Arm.

In the film, she portrayed a character named Genevieve. The project was directed by Brie Larson, Sarah Ramos, and Jessie Ennis.

The story explores the complications of modern communication and romantic relationships through a young man’s texting-based relationship.

The Arm received recognition at the Sundance Film Festival, winning a Special Jury Prize for Comedic Storytelling.

Milaine’s involvement let her participate in a creative project tied to her sister’s work.

Entertainment databases also link Mimsy Desaulniers to The Dew Project and Releasing My First Short Film, Warning: Childhood Cringe.

However, these limited credits do not establish that Milaine has pursued a full-time professional acting career.

Her entertainment involvement appears to be occasional rather than the central focus of her professional life.

Why Is Milaine Desaulniers Also Known as Mimsy?

People researching Milaine Desaulniers may encounter several name variations, including Raya Desaulniers, Raya Milaine Desaulniers, and Mimsy Desaulniers.

The name Mimsy appears in established entertainment reporting, school staff listings, and film credits.

For example, ELLE referred to Brie’s younger sister as Mimsy when discussing the family’s move to Los Angeles.

Similarly, the short film The Arm credits Mimsy Desaulniers as Genevieve.

Using different names can confuse readers searching for biographical information. However, public records link these variations to the same person.

Milaine Desaulniers Personal Life and Relationships

Unlike Brie Larson, Milaine Desaulniers does not have an extensive public presence centered on entertainment interviews and celebrity appearances.

She has generally kept her romantic relationships, friendships, and family arrangements private.

No sufficiently reliable public information confirms whether Milaine is married, has a husband, or has children.

Although some celebrity websites speculate about her relationship status, such claims should not be treated as facts without credible supporting evidence.

Her limited public visibility also means details about her everyday routines, personal preferences, and long-term plans are rarely documented.

This privacy is worth respecting, especially since her career does not require regular exposure to celebrity media.

Milaine Desaulniers Net Worth

Milaine Desaulniers’ net worth has generated curiosity among people researching her biography.

However, no reliable public financial documentation establishes her exact wealth.

Her work in education may provide employment income, but a salary doesn’t reveal her total net worth.

Personal wealth depends on many factors, including savings, assets, investments, expenses, and financial obligations.

Some online biographies publish speculative financial estimates for Milaine. These figures cannot be independently verified and should not be presented as confirmed information.

Unlike her older sister, whose entertainment contracts and commercial success have received significant public attention, Milaine’s financial affairs remain largely private.

Therefore, her exact 2026 net worth is unknown.

Milaine Desaulniers Public Appearances

Milaine Desaulniers has occasionally attracted media attention through her association with Brie Larson.

Published entertainment coverage links her to appearances alongside Brie, including the 2019 Academy Awards.

However, Milaine has not developed a regular public-facing celebrity career.

Most of the reliable information about her comes from family-related interviews, professional education records, and her limited entertainment credits.

Her public profile differs considerably from Brie’s, whose career includes international film premieres, award ceremonies, press events, and major promotional campaigns.

This distinction helps explain why far less publicly documented information exists about Milaine.

Interesting Facts About Milaine Desaulniers

Several details make Milaine Desaulniers an interesting subject for readers researching Hollywood families.

1. She is Brie Larson’s younger sister. Her connection to the Academy Award-winning actress is why people are interested in her biography.
2. She is also known as Mimsy. This name appears in entertainment credits and professional education listings.
3. She grew up in California. Her childhood included a family relocation to the Los Angeles area.
4. Her parents worked as chiropractors. Heather and Sylvain Desaulniers ran a chiropractic practice while married.
5. She has worked as a mathematics teacher. Her professional history includes teaching positions in California high schools.
6. She has supported student leadership activities. Her responsibilities have included serving as an Associated Student Body director.
7. She appeared in a short film. Milaine portrayed Genevieve in The Arm, which Brie Larson helped direct.
8. She shares Brie’s interest in video games. The sisters have enjoyed Nintendo’s Animal Crossing franchise since childhood.
9. She maintains a relatively private lifestyle. Much of her personal life remains out of the public eye.
10. Her career differs from her sister’s. While Brie works in film and television, Milaine’s strongest documented professional background is in education.

Frequently Asked Questions About Milaine Desaulniers

Conclusion

Milaine Desaulniers is best known as the younger sister of Hollywood actress Brie Larson. Still, her biography includes a professional career and personal experiences that extend beyond her famous family connection.

Growing up in California, she experienced significant family changes, including her parents’ separation and a move to the Los Angeles area. Her childhood was closely connected to Brie Larson’s early pursuit of acting, yet the sisters eventually developed different professional identities.

While Brie gained international recognition through award-winning film performances, Milaine pursued a career in mathematics education and student leadership. Her documented teaching experience, involvement in school activities, and occasional creative projects reveal a career built largely outside the Hollywood spotlight.

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