Monster's Ball is a 2001 American romantic drama film directed by Marc Forster, produced by Lee Daniels and written by Milo Addica and Will Rokos, who also appeared in the film. It stars Billy Bob Thornton, Heath Ledger, Halle Berry, and Peter Boyle, with Sean Combs, Mos Def, and Coronji Calhoun in supporting roles.

Thornton portrays a corrections officer who begins a relationship with a woman (Berry), unaware that she is the widow of a man (Combs) he assisted in executing. Principal photography began in May 2001 in New Orleans, Louisiana and lasted for five weeks.

Monster's Ball premiered at AFI Fest on November 11, 2001, and was theatrically released in the United States on February 8, 2002, by Lionsgate Films. The film received positive reviews, with critical acclaim directed at Berry's, Ledger's and Thornton's performances, Forster's direction, and Addica and Rokos' screenplay. It was also a significant commercial success, grossing $45 million worldwide on a production budget of $4 million.

The film received numerous accolades and nominations, and was nominated twice at the 74th Academy Awards for Best Actress (Berry) and Original Screenplay (Addica and Rokos), with Berry winning for her performance, becoming the first African-American woman to win the award.