Knives Out is a 2019 American mystery film written and directed by Rian Johnson. Daniel Craig leads an eleven-actor ensemble cast as Benoit Blanc, a famed private detective who is summoned to investigate the death of the bestselling author Harlan Thrombey (Christopher Plummer). Police rule Harlan's death a suicide but Blanc suspects foul play, and investigates to ascertain the true cause of his death. Johnson produced Knives Out with his longtime collaborator Ram Bergman. Funding came from MRC and tax subsidies from the Massachusetts state government.

Johnson conceived Knives Out in the mid-2000s. Wanting to modernize the whodunit films of the mid-twentieth century, the director was inspired by his interest in movie adaptations of Agatha Christie's stories. He then refocused on creating Star Wars: The Last Jedi (2017). Development of Knives Out resumed the following year, when Johnson wrote the screenplay in six to seven months. Principal photography on Knives Out began in October 2018 on a $40 million budget and ended that December. Location filming took place in suburban Boston. Nathan Johnson composed the film's classical score, which was inspired by his and Rian's favorite symphonic movie scores. Knives Out has been read as a work that investigates class warfare, wealth inequality, immigration, and race in contemporary American society.

Knives Out premiered at the 44th Toronto International Film Festival on September 7, 2019, and was distributed by Lionsgate to American theaters on November 27. The film was a critical and commercial success; the National Board of Review and the American Film Institute chose it as one of the year's top films, and it grossed $312 million. Critics praised the film's plot and actors, but criticized some aspects of the writing and performances. Knives Out was nominated for multiple awards, including three Golden Globes, a British Academy Film Award, and an Academy Award for Best Original Screenplay. Knives Out is the first entry of a franchise that also includes Glass Onion (2022) and Wake Up Dead Man (2025).