Milaine Desaulniers: what’s sourced about Brie Larson’s sister
Milaine Desaulniers is the younger sister of the actress Brie Larson, born Brianne Sidonie Desaulniers. Their parents, Heather and Sylvain Desaulniers, were chiropractors in Sacramento. After the marriage ended, their mother moved both girls to Los Angeles.
She has never given an interview and has no verified public accounts. Two claims made about her on nearly every page ranking for her name do not hold up, and one of them contradicts another claim on the same pages.
Milaine Desaulniers: quick facts
| Detail | What’s documented |
|---|---|
| Known for | Brie Larson’s younger sister |
| Mother | Heather Desaulniers, chiropractor |
| Father | Sylvain Desaulniers, chiropractor, French-Canadian |
| Sister | Brie Larson, born Brianne Sidonie Desaulniers, 1989 |
| From | Sacramento, California |
| Raised in | Los Angeles, after the divorce |
| Occupation | Not sourced anywhere, see below |
| Birth date | Reported as January 1993, not sourced |
| Public statements | None |
The maths teacher claim
Almost every page ranking for this name lists her occupation as mathematics teacher. One puts it in its headline.
Not one of them cites a source. No school, no district, no interview, no professional listing.
The detail that gives this away is which page leaves it out. Among the pages competing for this keyword, one repeatedly attributes its facts to People’s reporting on the Larson family. That page describes her parents’ careers, the Sacramento background, the divorce and the move to Los Angeles, all sourced. It does not say she teaches mathematics. Its answer to what she does is that mainstream reporting mentions her only in the context of her sister’s family background.
So the one page working from a named source does not carry the claim, and the pages working from each other do.
Treat it as unverified. It may well be true. Nobody has shown that it is.
The arithmetic doesn’t work
Here is a second problem, and it sits inside the pages themselves.
Those same pages state two things:
- Milaine was about two years old when her parents separated
- She was born on 5 January 1993
Brie Larson was born on 1 October 1989, and every account of the family says the divorce came when Brie was seven. That places it between late 1996 and late 1997.
A child born in January 1993 would have been three or four then, not two.
Both claims cannot be right. Either the birth date is wrong, or the age at the separation is, and the pages publishing both have not checked either.
What Brie Larson has actually described
The real material here comes from her sister, who has talked about their childhood in interviews for years.
Heather Desaulniers took her two daughters to Los Angeles for what was meant to be a three-week trip so Brie could go to auditions. It became permanent.
The three of them lived in a one-room studio apartment and slept together in a wall bed. Money was tight enough that meals ran to instant ramen and cheap tacos, and a McDonald’s Happy Meal was outside the budget.
Brie’s account of it is not a hardship story. She has said she never felt deprived, crediting her mother’s imagination for building a world in which the limits were invisible. She has described the period as one of the best of her life.
Milaine was a toddler through all of it. Whatever she remembers of that apartment is hers, and she has never been asked about it in public.
Brie has also said she has not spoken to her father in many years. That is her statement about her own relationship, not Milaine’s, and pages extending it to both sisters are extending it without evidence.
The Desaulniers name
Brie Larson’s stage name comes from her great-grandmother’s surname, chosen because Desaulniers is difficult for English speakers. Her sister kept the original.
It is also a common Québécois surname, which makes searching for her unusually noisy. The results are full of unrelated people, several of them notable:
- Élise Desaulniers, a Quebec author and animal rights advocate who won a national journalism prize in 2015
- Marcel Desaulniers, the American chef and cookbook author, Director Emeritus of the Culinary Institute of America, who died in 2024
- Michael Desaulniers, a former world number one hardball squash player
- Gerry Desaulniers, a Canadian ice hockey forward
- Several nineteenth-century Quebec politicians
None is related to her.
What isn’t verified about Milaine Desaulniers
- Her occupation. See above.
- Her date of birth. January 1993 is universal and unsourced, and conflicts with the family timeline.
- A 2019 Academy Awards appearance. Several pages list this as her one public appearance. Brie Larson won her Oscar in 2016 and presented in 2019. No source places her sister at either.
- Her education. Two pages state plainly that it is not publicly known, which is the accurate answer.
- Her current residence. “Believed to be in California” is a guess, and every page hedges it as one.
- Her marital status, children, or any personal detail. None is documented.
- Her relationship with her father. Brie has described her own. Milaine has said nothing.
Frequently asked questions
Who is Milaine Desaulniers?
The younger sister of Brie Larson, whose birth name is Brianne Sidonie Desaulniers.
Is she a maths teacher?
Widely reported, sourced nowhere. The one page citing mainstream reporting does not make the claim.
Who are her parents?
Heather and Sylvain Desaulniers, both chiropractors who practised in Sacramento.
Why is her surname different from Brie Larson’s?
Larson is a stage name, taken from their great-grandmother, because Desaulniers is hard for English speakers to say.
How old is she?
Not established. The January 1993 date on every page has no source and doesn’t fit the family timeline.
Has she ever spoken publicly?
No. Everything known about her comes from her sister’s interviews.
Is she related to the Quebec Desaulniers politicians?
No. The surname is common in Quebec and search results mix several unrelated people.
Final Words
There is a real story in this family and it belongs to the mother. Heather Desaulniers took a three-week trip to Los Angeles with two small daughters, ran out of money, stayed anyway, and raised both of them in one room until it worked.
Her younger daughter was a toddler for that and has never said a word about any of it since. What the pages competing for her name have done is fill that silence with a job nobody can source and a birthday that does not fit the calendar.
JacksonPadilla is a writer at Around Celebrities, covering celebrity families, relationships, biographies, and the stories behind the stars. With a focus on clear and engaging storytelling, Kole helps readers discover the people and connections beyond the spotlight.
