Tully, a new commedy brought to you by the famous director Jason Reitman and screenwriter Diablo Cody. The Plot Outline Of the Movie Tully, Starring (Charlize Theron, Mark Duplass,Mackenzie Davis): Marlo (Charlize Theron), a mother of three including a newborn, is gifted a night nanny by her brother (Mark Duplass). Hesitant to the extravagance at first, Marlo comes to form a unique bond with the thoughtful, surprising, and sometimes challenging young nanny named Tully (Mackenzie Davis).