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.