Ghostbusters is a 1984 American supernatural comedy film directed and produced by Ivan Reitman and written by Dan Aykroyd and Harold Ramis. It stars Bill Murray, Aykroyd, and Ramis as three eccentricparapsychologists in New York City who start a ghost-catching business. Sigourney Weaver and Rick Moranis co-star as a potential client and her neighbor. The Ghostbusters business booms after initial skepticism, but when an uptown high-rise apartment building becomes the focal point of spirit activity linked to the ancient god Gozer, it threatens to overwhelm the team and the entire world.