Badass BFFs Tina Fey and Amy Poehler are going to tear the big screen up, Project X–style, in Sisters this holiday season. Tina plays the wild child, whereas Amy plays the one who wants to learn how to let loose. Nothing is safe in their quest for party redemption — especially belts, dresses, and Ike Barinholtz’s butt. You’ll be able to catch all the mayhem in theaters December 12.