Brianne Sidonie Desaulniers was born in 1989. She grew up in Sacramento, Calif., raised by a single mom. She was homeschooled as a child, but Desaulniers always knew she wanted to perform. Though she's known for her Oscar-winning performance in Room, Larson has had quite a history in acting and singing that many aren't familiar with. She worked hard to be where she is today, so let's take a look at her stunning transformation from Brianne Sidonie Desaulniers to the fabulous Brie Larson.