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.

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.

It received generally positive reviews from critics, who praised Theron and Davis's performances and the film's portrayal of motherhood.

Craig, Marlo's wealthy brother, offers to pay for a night nanny as a baby gift, but she rebuffs him.

On their way home, Marlo falls asleep at the wheel, ends up in a river trapped underwater in the car, and Tully as a mermaid comes to rescue her.

She is taken to a hospital, where a psychiatrist informs a surprised Drew that Marlo was suffering from extreme sleep deprivation and exhaustion.

"[5] Reitman noted, according to Cody, that Tully fits together thematically with their previous collaborations, logically concluding an unintentional trilogy where "Juno is about being prematurely thrust into adulthood, Young Adult is about resisting adulthood, and Tully is about finding grace and acceptance in midlife.

[7] In May 2017, Focus Features acquired distribution rights to the film in North America, the U.K., Ireland, Italy, Spain, China, Malaysia, Singapore, the Czech Republic, Slovakia, Hungary and Romania.

[2] In the United States and Canada, Tully was released alongside Overboard and Bad Samaritan, and was projected to gross $3–4 million from 1,353 theaters in its opening weekend.

[13] On review aggregator Rotten Tomatoes, the film holds an approval rating of 87% based on 286 reviews, with an average rating of 7.6/10; the website's critical consensus reads: "Tully delves into the modern parenthood experience with an admirably deft blend of humor and raw honesty, brought to life by an outstanding performance by Charlize Theron.

"[14] On Metacritic, the film has a weighted average score of 75 out of 100 based on 52 critics, indicating "generally favorable reviews".

[20]Diana Spalding (the digital education editor for the website Motherly, a midwife, and a pediatric nurse) argued that Theron's character displays behaviors more typical of postpartum psychosis, the symptoms of which include delusions, hallucinations, periods of extreme activity, anger, paranoia, and trouble communicating.

Along with other negative critics of the movie, Spalding had looked forward to seeing a film about what motherhood is truly like, but instead found the issue of postpartum mental illness "unaddressed", and Marlo's suicidal ideation normalized.