Tully is a 2018 American comedy-drama film directed by Jason Reitman, written by Diablo Cody, and starring Charlize Theron, Mackenzie Davis, Mark Duplass, and Ron Livingston. The film follows the friendship between a mother of three and her night nanny. It is the third collaboration between director Jason Reitman and screenwriter Diablo Cody, following the films Juno (2007) and Young Adult (2011), the latter of which also starred Theron.