Thoroughbreds is a 2017 American black comedy thriller film written and directed by Cory Finley in his directorial debut. It follows high school student Lily (Anya Taylor-Joy) and her emotionless friend Amanda (Olivia Cooke) as they scheme to kill Lily's stepfather (Paul Sparks) via a contract with a drug dealer (Anton Yelchin) while Francie Swift also stars, as Lily's mother.

Thoroughbreds was filmed in mid-2016. Two weeks after production wrapped, Yelchin died in an accident. The film premiered as Thoroughbred at the Sundance Film Festival on January 21, 2017. Over a year later, on March 9, 2018, it received a wide release by Focus Features. It is the last U.S. film to star Yelchin, and is dedicated to him.

The film received positive reviews from critics, who praised the ambitious direction, screenplay, and performances, particularly from Cooke and Taylor-Joy. It grossed $3 million against a $5 million production budget.