- The Christmas Letter
2024 Norm De Plume
- Glisten and the Merry Mission
2023 Santa (voice)
- Zombie Town
2023 Mezmerian
- Panda vs. Aliens
2021 King Karoth (voice)
- The Very Excellent Mr. Dundee
2020 Chevy
- The Last Laugh
2019 Al Hart
- Wildchat
2019
- The Last Movie Star
2018 Sonny
- A Christmas in Vermont
2016 Preston Bullock
- Hot Tub Time Machine 2
2015 Repairman
- Vacation
2015 Clark Griswold
- Shelby: The Dog Who Saved Christmas
2014 Grandpa Geoffrey
- Wishin' and Hopin'
2014 Adult Felix
- Lovesick
2014 Lester Horn
- Before I Sleep
2013 Gravedigger
- Stay Cool
2011 Principal Marshall
- Not Another Not Another Movie
2011 Max Storm
- Someplace with a Mountain
2011 Narrator (voice)
- Inside Story: National Lampoon's Vacation
2011 Executive Producer
- Hot Tub Time Machine
2010 Repairman
- Hotel Hell Vacation
2010 Clark Griswold
- The Women of SNL
2010 Various (archive footage)
- Presidential Reunion
2010 Gerald Ford
- Jack and the Beanstalk
2009 Antipode
- Cutlass
2007 Stan
- Family Guy Presents: Blue Harvest
2007 Clark Griswold (voice)
- The Secret Policeman's Ball: The Ball in the Hall
2006 General Nuisance
- Doogal
2006 Train (voice)
- Funny Money
2006 Henry
- Zoom
2006 Dr. Grant
- The Karate Dog
2006 Cho-Cho (voice)
- Goose on the Loose
2006 Congreve Maddox
- Ellie Parker
2005 Dennis Swartzbaum
- Our Italian Husband
2004 Paul Parmesan
- Bad Meat
2004 Congressman Bernard P. Greely
- Stealing Bess
2003 Mr. Punch
- Orange County
2002 Principal Harbert
- Added Attractions: The Hollywood Shorts Story
2002 Narrator (voice)
- Ellie Parker
2001 Dennis
- Snow Day
2000 Tom Brandston
- Pete's a Pizza
2000 Narrator
- The Scrambled States of America
2000 (voice)
- Dirty Work
1998 Dr. Farthing
- Vegas Vacation
1997 Clark Griswold
- Man of the House
1995 Jack Sturgess
- Cops & Robbersons
1994 Norman Robberson
- Memoirs of an Invisible Man
1992 Nick Holloway
- Hero
1992 Deke - Channel 4 News Director
- Nothing but Trouble
1991 Chris Thorne
- L.A. Story
1991 Carlo Christopher (uncredited)
- The Earth Day Special
1990 Vic's Buddy
- National Lampoon's Christmas Vacation
1989 Clark Griswold
- Fletch Lives
1989 Irwin 'Fletch' Fletcher
- The Couch Trip
1988 Condom Father
- Funny Farm
1988 Andy Farmer
- Caddyshack II
1988 Ty Webb
- ¡Three Amigos!
1986 Dusty Bottoms
- National Lampoon's European Vacation
1985 Clark Griswold
- Spies Like Us
1985 Emmett Fitz-Hume
- Fletch
1985 Irwin 'Fletch' Fletcher
- Follow That Bird
1985 Newscaster
- The Best of John Belushi
1985 Various Characters
- National Lampoon's Vacation
1983 Clark Griswold
- Deal of the Century
1983 Eddie Muntz
- Modern Problems
1981 Max Fielder
- Under the Rainbow
1981 Bruce Thorpe
- Caddyshack
1980 Ty Webb
- Oh! Heavenly Dog
1980 Browning
- Seems Like Old Times
1980 Nick Gardenia
- The Chevy Chase National Humor Test
1979 Writer
- Foul Play
1978 Tony Carlson
- The Chevy Chase Show
1977 Writer
- The Paul Simon Special
1977 Writer
- Tunnel Vision
1976 Chevy Chase
- The Groove Tube
1974 The Fingers / Geritan / Four Leaf Clover
- Energy Crisis
1974 Writer
- Lemmings
1973 Various
