Twilight actress Kristen Stewart is set to make the jump from emo vampires to punk rockers after being cast as Joan Jett in the upcoming Runaways biopic. The film, called simply The Runaways, will be written and directed by music video vet Floria Sigismondi (Marilyn Manson's "The Beautiful People," the White Stripes' "Blue Orchid"). The biopic will focus on the band's "meteoric rise as teenagers to their dissolution and disillusionment." Additional casting for the roles of keyboardist Cherie Currie and guitarist Lita Ford has not been announced yet. The Runaways are generally regarded as the first all-girl rock band and stayed together for roughly four years. Jett went on to have an even more successful solo career. Though the casting of Stewart as Jett bothers us a lot less than having Kirsten Dunst play Debbie Harry, is she T-U-F-F enough to fill Jett's leather boots?