Named The Movie Fanatic's Hottest Young Actress .
Replaced Hayden Panettiere as Sarah Altman in Panic Room (2002) just before shooting began.
Has a small cameo in the Jules Stewart directorial debut, K-11 (2012). She did a voice-over to play Karen, Raymond Saxx Jr.'s secretary, when he calls his office. The film is also her older brother Cameron B. Stewart's acting debut.
Prior to filming The Runaways (2010), she worked closely with Joan Jett to perfect her mannerisms, stage presence, vocal tone, attitude and musical skill. Jett later praised Stewart for her dedication and overall performance stating the portrayal made her proud.
Did most of her own stunts for her role as Snow White in Snow White and the Huntsman (2012).