'Tully' Teaser: Charlize Theron Adjusts to the New Nanny

Mackenzie Davis and Mark Duplass also star in the Jason Reitman comedy.

Charlize Theron is a mother of three in the teaser trailer for the Jason Reitman comedy Tully.

The Focus title reunites Theron, Reitman and screenwriter Diablo Cody, who collaborated on the 2011 movie Young Adult. Cody and Reitman also previously teamed up for 2007's Juno, for which Cody won the Oscar for best original screenplay.

Tully stars Theron as Marlo, a mother whose brother (Mark Duplass) gives her a night nanny. Though she is hesitant to accept the extravagance at first, Marlo comes to form a unique bond with the thoughtful, surprising and sometimes challenging young nanny named Tully (Mackenzie Davis).

Tully hits theaters on April 20.