“It was the Wild West of Theater!” is how Amber Heard described last night’s performance of the 12th annual 24 Hour Plays, a theater experience presented by Montblanc in which six short plays are written, rehearsed, and performed in a 24-hour time period, all to benefit the Urban Arts Partnership, which supports arts education for children in need. “It was the best time. It was a lot of fun it was the kind of environment that allows you to feel free enough to really enjoy yourself and experiment with new things and it was for a good cause.” Heard was only one of the 27 actors who performed at the American Airlines Theater, and she and her fellow castmates—Vanessa Hudgens, Emmanuelle Chriqui, Olivia Wilde, Jack McBrayer, Justin Long, and Jason Biggs (in his third year performance) included—all breathed a sigh of relief at the end, toasting to their success with an after-party at B.B. King Blues Club. More than anything, now they can rest. "I'm excited for sleep more than you can imagine!" Heard added. Click through the gallery to see more of last night’s biggest parties.