Heathers is a 1989 American teen black comedy film written by Daniel Waters and directed by Michael Lehmann, in both of their respective film debuts. The film stars Winona Ryder, Christian Slater, Shannen Doherty, Lisanne Falk, Kim Walker, and Penelope Milford. Its plot portrays four teenage girls—three of whom are named Heather—in a clique at an Ohio high school, one of whose lives is disrupted by the arrival of a misanthrope intent on murdering the popular students and staging their deaths as suicides.

Waters wrote Heathers as a spec script and originally wanted Stanley Kubrick to direct the film, out of admiration for Kubrick's own black comedy film Dr. Strangelove. Waters intended the film to contrast the optimistic teen movies of the era, particularly those written by John Hughes, by presenting a cynical depiction of high school imbued with dark satire.

Filmed in Los Angeles from February to early April 1988, Heathers was released theatrically in the United States on March 31, 1989. It went on to win the Independent Spirit Award for Best First Feature, and for his screenplay, Waters received the Edgar Award for Best Motion Picture Screenplay. It has since become popular and is regarded in polls as one of the greatest coming-of-age films, and dark comedy of all time. Heathers has since been adapted into a musical and a television reboot.