If you haven’t watched, or never heard of, “Ghostbusters”, it’s basically a supernatural comedy film released in 1984 that was 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. Continue reading to see a few interesting facts.

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Aykroyd pitched his story to director/producer Ivan Reitman, who liked the basic idea but immediately saw the budgetary impossibilities demanded by Aykroyd’s first draft. At Reitman’s suggestion, the story was given a major overhaul, eventually evolving into the final screenplay which Aykroyd and Ramis hammered out over the course of three weeks in a Martha’s Vineyard bomb shelter in May-June 1982.

Aykroyd and Ramis initially wrote the script with roles written especially for Belushi, Eddie Murphy, and John Candy; but Belushi died during the writing of the screenplay, and neither Murphy nor Candy would commit to the movie, so Aykroyd and Ramis made some changes and polished a basic, science-fiction-oriented screenplay for their final draft.

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