Lady Bird is a 2017 American coming-of-age comedy-drama film written and directed by Greta Gerwig in her solo directorial debut, starring Saoirse Ronan, Laurie Metcalf, Tracy Letts, Lucas Hedges, Timothée Chalamet, Beanie Feldstein, Stephen McKinley Henderson, and Lois Smith. Set in Sacramento, California from fall 2002 to fall 2003, it focuses on a high school senior who shares a turbulent relationship with her mother.

Filming for Lady Bird took place from August to October 2016 in California and New York. It premiered at the 44th Telluride Film Festival on September 1, 2017, and was released theatrically in the United States on November 3, 2017, by A24. The film received widespread critical acclaim, with high praise drawn to Gerwig's screenplay and direction, and the performances of Ronan and Metcalf. It was considered by many critics as one of the best films of 2017 and one of the best films of the 2010s. Lady Bird was chosen by the National Board of Review, the American Film Institute, and Time magazine as one of the top ten films of 2017. At the 90th Academy Awards, it earned five nominations: Best Picture, Best Actress (for Ronan), Best Supporting Actress (for Metcalf), Best Original Screenplay, and Best Director. At the 75th Golden Globe Awards, the film won two awards—Best Motion Picture (Musical or Comedy) and Best Actress in a Musical or Comedy (for Ronan)—and was nominated for two others. It was also nominated for three British Academy Film Awards. The film was released with a soundtrack.