Invasion of the Body Snatchers is a 1956 American science-fiction horror film produced by Walter Wanger, directed by Don Siegel, and starring Kevin McCarthy and Dana Wynter. The black-and-white film was shot in 2.00:1 Superscope and in the film noir style. Daniel Mainwaring adapted the screenplay from Jack Finney's 1954 science-fiction novel The Body Snatchers. The film was released by Allied Artists Pictures as a double feature with the British science-fiction film The Atomic Man.

Science fiction is a film genre that uses speculative, fictional science-based depictions of phenomena that are not fully accepted by mainstream science, such as extraterrestrial lifeforms, spacecraft, robots, cyborgs, mutants, interstellar travel, time travel, or other technologies. Science fiction films have often been used to focus on political or social issues, and to explore philosophical issues like the human condition.