Besides acting, she is also a professional singer.
Sang "Coming Around" in her movie Hoot (2006).
Read the book "Hoot" before she had read the screenplay.
Moved to Los Angeles, California, right before her ninth birthday (1998).
First job was performing in sketches on The Tonight Show with Jay Leno (1992). Soon after, was cast in the television series, Schimmel (2000), which was announced in 2000 but never aired, since right before filming, Robert Schimmel was diagnosed with cancer. After being "on hold" for six months, Fox canceled the show.
In May 2005, she went on tour with Jesse McCartney.
Daughter of Heather (Edwards) and Sylvain Desaulniers. Her paternal grandparents were Aurèle Desaulniers and Gabrielle Marie-Therese (Chatelain) Desaulniers (1931-2015), who were French-Canadians from Winnipeg. Her mother's family is based in California. Her mother has English, Swedish, German, Welsh, and Scottish ancestry. Brie's stage surname, "Larson", is after her matrilineal great-grandmother, Elva Josephine Larson.
Brie's go-to karaoke song is Usher Raymond's "Burn" from the album "Confessions" (2004).
Has acted since she was seven years old. However, she considered quitting acting several times as she found the film business to be too difficult and was unable to get the roles she wanted. She pursued careers in photography, interior design and animal training, but ultimately decided to stick with acting.
Has been in a relationship with Alex Greenwald, vocalist with rock band Phantom Planet, since 2013.
To prepare for her role as Ma in Room (2015), she stayed at home for a whole month and went on a strict diet, to get an understanding of what Ma and Jack were going through.
Is a huge fan of the Super Mario Bros video games.
Shared the cover of Vanity Fair magazine's 2016 Hollywood issue with, Jane Fonda, Viola Davis, Cate Blanchett, Jennifer Lawrence, Rachel Weisz, Lupita Nyong'o, Charlotte Rampling, Alicia Vikander, Gugu Mbatha-Raw, Helen Mirren, Diane Keaton and Saoirse Ronan. Photographed by Annie Leibovitz.