The film follows Marlo (played by Theron) as she journeys through motherhood and her marriage to Drew (Ron Livingston). We see Marlo consoling a crying infant, crying over spilt breastmilk and feeling too tired to function in her roles as mom and wife.
Marlo's brother (Mark Duplass) suggests she employ a night nanny to help.
That woman, we learned in the first trailer for the film, directed by Jason Reitman and written by Diablo Cody, is Tully (Makenzie Davis), who appears at Marlo's door announcing, "I'm here to take care of you."
Although she is resistant, Marlo appears to take the advice to heart.
The emotional trailer reminds viewers to "let someone in," and shows a moment most moms can relate to, where Theron admits she is "not used to people doing things for her."
Tully pushes Marlo to think through her own feelings of emptiness and frustration, reminding her that through her family she has "actually made her biggest dreams come true."
Overwhelmed moms everywhere may want to plan their girls nights out to see "Tully" now — Reitman and Cody have worked together previously on films like "Young Adult" and "Juno," which offered honest, hilarious looks into real life.