Ghostbusters is a 1984 American supernatural comedy film directed by Ivan Reitman and written by Dan Aykroyd and Harold Ramis. The film stars Bill Murray, Aykroyd, and Ramis as three eccentric parapsychologists in New York City, who start a ghost catching business. Sigourney Weaver and Rick Moranis co-star as a potential client and her neighbor. It was released in the United States on June 8, 1984 and made US$238,632,124 in the United States. The American Film Institute ranked Ghostbusters 28th in its AFI's 100 Years...100 Laughs list of film comedies.

The film was followed by a sequel, Ghostbusters II in 1989, and two animated television series, The Real Ghostbusters and Extreme Ghostbusters. As of January 2013, a third feature film still remains uncertain.