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 summoned to investigate the death of bestselling author Harlan Thrombey (Christopher Plummer). Although police rule Harlan's case a suicide, Blanc suspects foul play and examines a host of clues and deceptive red herrings to ascertain his true manner of death. Johnson produced Knives Out with longtime collaborator Ram Bergman. Lionsgate managed the film's commercial distribution, and funding was sourced through MRC and a multimillion-dollar tax subsidy from the Massachusetts state government.

Johnson conceived Knives Out in the mid-2000s. Seeking to modernize the whodunit films of the mid-twentieth century, the director was inspired by his interest in big-screen movie adaptations of Agatha Christie's stories. Johnson 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 or seven months. He devised a framework of tonal shifts to escalate tension between the characters, and informed elements of the story with his experience coping with intense culture war backlash to The Last Jedi. Principal photography began in October 2018 on a $40 million budget and wrapped that December. Shooting took place on location in suburban Boston. Nathan Johnson composed the film's classical score, which drew on an eclectic array of 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 to American theaters on November 27 to major critical and commercial success. It was chosen as one of the year's top films by the National Board of Review and the American Film Institute, and finished its theatrical run grossing $312.9 million at the global box office. Critics distinguished the film's plot and actors for praise, though some aspects of the writing and performance drew criticism. It was nominated for multiple awards, among them three Golden Globes, a British Academy Film Award (BAFTA), and an Academy Award for Best Original Screenplay. Knives Out is the first entry of what became a franchise that includes two more films—Glass Onion: A Knives Out Mystery (2022) and Wake Up Dead Man: A Knives Out Mystery (2025).