Kristen Stewart stars as Joan Jett in THE RUNAWAYS

Kristen Stewart gives her most challenging performance to date with her portrayal of Joan Jett in The Runaways. Jett is a take-no-prisoners music star with charisma to spare, so the reserved Stewart had to break out of her comfort zone to finally rock out. Did Jett have a huge role in shaping Stewart’s performance? We think so, but Jett says not really. (CLICK ON THE MEDIA BAR BELOW TO HEAR JOAN JETT)