Deathtrap is a 1982 American black comedy suspense film based on the 1978 play of the same name by Ira Levin. It was directed by Sidney Lumet from a screenplay by Levin and Jay Presson Allen, and stars Michael Caine, Dyan Cannon and Christopher Reeve. Critics gave the film mostly favorable reviews, while noting its plot similarities to Caine's 1972 film Sleuth.

Deathtrap is a 1978 American play written by Ira Levin with many plot twists and which refers to itself as a play within a play. It is in two acts with one set and five characters. It holds the record for the longest-running comedy-thriller on Broadway, and was nominated for four Tony Awards, including Best Play. Deathtrap was well received by many and has been frequently revived. It was adapted into a film starring Michael Caine, Dyan Cannon and Christopher Reeve in 1982. The locale is in Westport, CT.