Kristen Stewart, 18, and Dakota Fanning, 15, will star in a movie together — as members of an all-girl hard rock band. Stewart will play Joan Jett in the biopic The Runaways, while Fanning will play the band’s 15-year-old lead singer Cherri Currie, according to Variety. The movie will reportedly begin filming after the Twilight sequel New Moon is completed, in which Stewart stars and Fanning is rumored to be playing a supporting role. The Runaways, whose hits include ‘Cherry Bomb’ and ‘Queens Of Noise’, parted ways in 1979. Jett then went on to form Joan Jett and the Blackhearts and had her own hit songs such as ‘I Love Rock ‘n’ Roll’ and ‘Bad Reputation.’ In other news, Stewart reportedly bragged that Twilight fans would be incredibly upset if she bowed out of the series, saying: “It would be so easy for me to send so many hundreds of girls into such a frenzy by saying I want no part of any future [Twilight] movies.” However, she might be getting herself confused with Robert Pattinson — many Twilight fans say they would only be too thrilled to see Stewart replaced.