It's Complicated is a 2009 American romantic comedy film written and directed by Nancy Meyers. It stars Meryl Streep as a bakery owner and single mother of three who starts a secret affair with her ex-husband, played by Alec Baldwin, ten years after their divorce – only to find herself drawn to another man: her architect, Adam (portrayed by Steve Martin). The film also features supporting performances by Lake Bell, Hunter Parrish, Zoe Kazan, John Krasinski, Mary Kay Place, Robert Curtis Brown, and Rita Wilson, among others.

It's Complicated received mixed reviews from critics upon release, with praise for the performances of the ensemble cast, with mild criticism for its "somewhat predictable" story. It was released in the United States and Canada on Christmas Day 2009, it played well through the holidays and into January 2010, closing on April 1 with $112.7 million. Worldwide, It's Complicated eventually grossed $219.1 million, surpassing The Holiday (2006) to become Meyer's third-highest-grossing project to date.

It's Complicated received three nominations at the 67th Golden Globe Awards – Best Motion Picture – Musical or Comedy, Best Screenplay (both for Meyers) and Best Actress – Motion Picture Comedy or Musical (Streep). At the 63rd British Academy Film Awards, Baldwin received a nomination for Best Actor in a Supporting Role, while the film's ensemble cast won the National Board of Review Award for Best Cast at the 2009 ceremony.