Ghostbusters (titled on-screen as Ghost Busters) is a 1984 science-fiction comedy film written by co-stars Dan Aykroyd and Harold Ramis about three eccentric New York City parapsychologists-turned-ghost exterminators. The film was released in the United States on June 8, 1984 and like several films of the era, teamed Aykroyd and/or Ramis with headliner Bill Murray. It was produced and directed by Ivan Reitman, who also directed Stripes, and stars Murray, Aykroyd, Ramis, Rick Moranis, Sigourney Weaver, Annie Potts, and Ernie Hudson. With inflation adjustments, the film's original release grossed over $500 million US dollars counting sales in just the U.S., making it domestically one of the highest-grossing films of 1984 and also domestically the 31st highest-grossing film.
It was followed by a sequel, Ghostbusters II (1989), and two animated television series, The Real Ghostbusters (later renamed Slimer! And the Real Ghostbusters) and Extreme Ghostbusters. Ramis, who co-wrote the first two films, has confirmed that a script for a potential third film - a spin-off sequel with the original cast appearing only as minor characters - is being developed by Gene Stupnitsky and Lee Eisenberg, the writing team best known for their work on Curb Your Enthusiasm and the American version of The Office. Producer Judd Apatow (a producer of the Ramis-directed Year One) is also slated to be involved. Ramis told a Chicago Tribune columnist in 2008 that the original films' four main cast members may have minor on-screen roles: "[T]he concept is that the old Ghostbusters would appear in the film in some mentor capacity".
