"National Lampoon's Animal House"Ramis was one of the writers on "National Lampoon's Animal House," the 1978 hit comedy directed by John Landis. It starred John Belushi, Tim Matheson, John Vernon, Verna Bloom, Thomas Hulce and Donald Sutherland.
Ramis directed 1980's "Caddyshack" with Chevy Chase and Bill Murray.
Ramis, seen here with Bill Murray, in a scene from the 1981 American war-comedy "Stripes," which also starred John Candy. Ramis also co-wrote the screenplay for the film.
"National Lampoon's Vacation"
Ramis directed the 1983 big-screen comedy "National Lampoon's Vacation," starring Chevy Chase.
Ramis is seen here in the 1984 classic "Ghostbusters" with Dan Aykroyd, Sigourney Weaver and Bill Murray.
Ramis appeared in and also co-wrote the 1989 film "Ghostbusters II" with Dan Aykroyd, Sigourney Weaver and Bill Murray.
Ramis directed and co-wrote the 1993 film "Groundhog Day" starring Bill Murray and Andie MacDowell.
"The Ice Harvest"
Ramis directed 2005's "The Ice Harvest" with John Cusack, Billy Bob Thorton and Connie Nielsen.
Michael Keaton and Andie MacDowell were among the stars in 1996's "Multiplicity," a film directed by Ramis.
Steve Carell, left, and Harold Ramis wait for the start of the 2007 NBA All-Star game in Las Vegas on Feb. 18, 2007.
Director Harold Ramis and actor John Cusack pose during an interview in New York, Nov. 14, 2005. Ramis directed and Cusack stars in the film "The Ice Harvest."
Ramis directed "Analyze This," the 1999 crime-comedy with Robert De Niro and Billy Crystal.
"Analyze That" -- the sequel to "Analyze This" -- was directed again by Ramis with Robert De Niro and Billy Crystal reprising their roles.
Danish actress Connie Nielsen and Harold Ramis pose during a photocall before the film "The Ice Harvest" is screened at the 31th American Film Festival of Deauville, Sept. 3, 2005.
Jo Flaherty, left, Eugenie Ross-Leming, second left,, Harold Ramis, second right, Jim Belushi, right, and Judy Morgan perform a skit as part of celebrations marking the 50th anniversary of improv theater, The Second City, in Chicago, Dec. 12, 2009.