Larson knew she wanted to be an actor since age 6. She got her start at 7 years old when she began performing in sketches on The Tonight Show with Jay Leno. Her first gig on the show? Starring in a parody commercial that Leno called "Mudslide Barbie."
Growing up, Larson's first language was French. "It’s something that as I got older and I started learning more English, I started losing more and more of my French speaking," she told The Film Stage. "But it is in there and I do know some of it still."
Larson's real name is Brianne Sidonie Desaulniers. Earlier this year, she told The Tonight Show with Jimmy Fallon that her choice of the stage name Larson was at least partially influenced by the American Girl doll, Kirsten Larson, she received as a child.
Before her acting career took off, Larson released a pop album, 2005's Finally Out of P.E. But as she told Variety, she really only fell into the music world by accident. "I had no aspirations for that, but within seconds, I had a record deal," she said. "Tommy Mottola signed me, and I was being flown all over the U.S. to write songs for my album."
Larson is good friends with Shailene Woodley. The two co-starred in The Spectacular Now and shared a New York magazine cover, seen above.
Larson co-wrote and co-directed the short film The Arm, which won the Special Jury Award for Comedic Storytelling at the 2012 Sundance Film Festival.
While Room is by far her most spotlight-grabbing role, it's not the first time that Larson has earned positive attention from critics. She co-starred alongside Amy Schumer in this year's Trainwreck and also earned rave reviews for her starring role in the 2013 indie film Short Term 12.
In a Reddit AMA, Larson revealed that she's studied mycology, the biology of fungi. Further proof of her passion for the study? She describes herself as "mushroom forager" on Twitter.
But that's not her only unexpected hobby. Larson also enjoys designing typeface, something that she's done since she was a teen and which she says helps her decompress. "I made three or four different fonts during Short Term 12 — it was how I'd calm my mind between scenes," she told The Guardian.
To prepare for her role as the mother held captive in a small room, Larson isolated herself for weeks on end. She also spent six months in pre-production studying the effects of sexual abuse, as well as reading about people in solitary confinement and captivity. Unsurprisingly, the role took a toll on Larson, putting her through what she has since labeled an “emotional marathon."
Though she's now an Oscar nominee, Larson isn't letting it go to her head. In fact, she completely shuns the label of "It girl." "What is 'it?' There is no 'it!' And who was 'it' before 'it?' And when does 'it' go away? When did I get 'it?' Who's gonna take 'it?'" she recently told CBS. "It's so weird. I think it's a really funny term. I'm just a person. I'm not anything!"
Room is just the beginning of what's set to be a big few years for Larson. She's set to star in the indie musical romcom Basmati Blues and the British crime drama Free Fire next year. She also nabbed a role opposite Tom Hiddleston in Kong: Skull Island, due out in 2017.
And you'll see personalized content just for you whenever you click the My Feed .
SheKnows is making some changes!