The Killing of a Sacred Deer is a 2017 absurdist psychological horror thriller film directed and co-produced by Yorgos Lanthimos, who also co-wrote the screenplay with Efthimis Filippou. It stars Colin Farrell, Nicole Kidman, Barry Keoghan, Raffey Cassidy, Sunny Suljic, Alicia Silverstone, and Bill Camp. It follows a cardiac surgeon who introduces his family to a teenage boy with a connection to his past, after which they mysteriously begin to fall ill.

The film had its world premiere at the 70th Cannes Film Festival on 22 May 2017, where it was awarded Best Screenplay. It was theatrically released in Ireland and the United Kingdom on 3 November 2017, by Curzon. It grossed $10.7 million worldwide and received positive reviews from critics, who praised Lanthimos' direction, the screenplay, cinematography, and performances of the cast (particularly those of Keoghan, Farrell, and Kidman). At the 15th Irish Film & Television Awards, the film earned four nominations, with Keoghan winning Best Supporting Actor. It was nominated for Best Director, Best Screenwriter, and Best Actor (Farrell) at the 30th European Film Awards, and for Best Supporting Male (Keoghan) and Best Cinematography at the 33rd Independent Spirit Awards.