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Killer Klowns from Outer Space is a 1988 American science fiction horror comedy film  written, directed and produced by the Chiodo Brothers , and starring Grant Cramer , Suzanne Snyder , John Allen Nelson and John Vernon . It is the only film to be written and directed by the Chiodo Brothers. The film is about a clan of evil aliens from an unknown region, who all resemble circus clowns . They arrive on Earth and invade a small town in order to capture, kill, and harvest the human inhabitants to use as sustenance.