Harold Allen Ramis (November 21, 1944 - February 24, 2014) was an American actor, director, and writer specializing in comedy. His best-known film acting roles are as Egon Spengler in Ghostbusters (1984) and Russell Ziskey in Stripes (1981); he also co-wrote both movies. As a writer-director, his films include the comedies Caddyshack (1980), National Lampoon's Vacation (1983), Groundhog Day (1993), and Analyze This (1999). Ramis was the original head writer of the television series SCTV (in which he also performed), and one of three screenwriters for the film National Lampoon's Animal House (1978).
Ramis's films have influenced subsequent generations of comedians and comedy writers. Filmmakers Jay Roach, Jake Kasdan, Adam Sandler, and Peter and Bobby Farrelly have cited his films as amongst their favorites.