20th Century Women is a 2016 American coming-of-age comedy drama film written and directed by Mike Mills and starring Annette Bening, Elle Fanning, Greta Gerwig, Lucas Jade Zumann, and Billy Crudup. It is set in 1979 in Southern California and partly inspired by Mills's childhood.

The film was produced by Annapurna Pictures in 2015. It had its world premiere at the New York Film Festival on October 8, 2016, and was theatrically released by A24 on December 28. Critics responded favorably to the film, and it was nominated for Best Motion Picture – Musical or Comedy and Best Actress (Bening) at the 74th Golden Globe Awards, as well as Best Original Screenplay at the 89th Academy Awards.