Stewart, 13 at the time of filming, played a high school freshman, Melinda Sordino, who after being raped nearly stops speaking.
Stewart appeared as teenager Lucy Hardwicke in In the Land of Women (2007), a romantic drama starring Meg Ryan and Adam Brody.The film, as well as Stewart's performance, received mixed reviews.I never sought out acting, but I always practiced my autograph because I love pens.I'd write my name on everything." She also appeared in the independent film The Safety of Objects (2001), as the tomboy daughter of a troubled single mother (Patricia Clarkson).That year Stewart also played the role of Lila in the thriller, Undertow (2004).
Stewart starred in the Lifetime/Showtime television film Speak (2004), based on the novel by the same name by Laurie Halse Anderson.
She went on to star in Speak (2004), Catch That Kid (2004), Zathura (2005), and Into The Wild (2007), for which she was nominated for a Screen Actors Guild Award.
She received widespread recognition in 2008 for playing Bella Swan in The Twilight Saga film series (2008–12), which grossed over .3 billion worldwide.
In 2015, she received critical acclaim for her role opposite Juliette Binoche in Clouds of Sils Maria, for which she won a multitude of accolades, including the César Award for Best Supporting Actress, making her the first American actress to win a César Award.
She starred in Personal Shopper (2016), written for her by director Olivier Assayas, who had worked with her in the previous film.
As she grew up with a family who worked behind the camera, Stewart thought she would become a screenwriter/director, but never considered being an actor.