Rock band Green Day is heading to the big screen this summer, in a new film inspired by both the height of their fame, and their early days. Nimrodsis the hottest rock comedy of the year, and it weaves in its real-life inspiration with a fictionalized counterpart; they're destined to collide in a hilarious case of mistaken identities. We finally know when the film will hit theaters, and we've got a first look at the film's poster.