She attended school until the seventh grade, and then continued her education by correspondence. Her whole family worked behind the camera, and Stewart thought she would become a writer/director, but never considered being an actress."I never wanted to be the center of attention - It wasn't that 'I want to be famous, I want to be an actor' kid.
After Panic Room's success, Stewart was cast in another thriller, Cold Creek Manor, playing the daughter of Dennis Quaid's and Sharon Stone's characters; the film generally failed at the box office.
Her first starring role followed, in the children's action-comedy Catch That Kid, opposite Max Thieriot and Corbin Bleu.
Stewart's first role was a nonspeaking part in the film The Thirteenth Year.
She subsequently appeared in the independent film The Safety of Objects, in which she played the tomboy daughter of a troubled single mother.
considered her work a "sturdy, sensitive performance", Her performance was not without detractors, however; Variety's critic Dennis Harvey wrote, "It's unclear whether Stewart means to be playing hippie-chick Tracy as vapid, or whether it just comes off that way." She also co-stars in The Cake Eaters and The Yellow Handkerchief, both independent films that have only been screened at film festivals.
On November 16, 2007, Summit Entertainment announced that Stewart would play Isabella "Bella" Swan in the film Twilight, based on Stephenie Meyer's bestselling vampire romance novel of the same name.Her mother, Jules Mann-Stewart, is a script supervisor originally from Maroochydore, Queensland, Australia.She has an older brother, Cameron Stewart, and two adoptive brothers, Taylor and Dana.Stewart also played the role of Lila in the thriller Undertow.To date, Stewart's most critically acclaimed role may be in the television film Speak (2004), based on the novel by Laurie Halse Anderson.In 2005, Stewart appeared in the fantasy-adventure film Zathura, playing the role of Lisa, the irresponsible older sister of two little boys, who turn their house into a spacecraft hurtling uncontrollably in outer space by playing a board game.