Johnny Galecki is a Belgian-born American actor, best known for his roles as David Healy in Roseanne, Rusty Griswold in National Lampoon's Christmas Vacation, and as Leonard Hofstadter in The Big Bang Theory.
2025I'm Chevy Chase and You're NotMovieas Self
2020The Little Dog LaughedMovieas Alex
2020Stars in the HouseTV showas Self · 1 episodes
2019Unraveling the Mystery: A Big Bang FarewellMovieas Self - Host2019A Dog's JourneyMovieas Henry Montgomery
2018The ConnersTV showas David Healy · 4 episodes
2018SciJinksTV showas Self - Host · Executive Producer · 8 episodes
2018The CleanseMovieas Paul Berger · Producer2017RingsMovieas Gabriel Brown
2016Must See TV: An All Star Tribute to James BurrowsMovieas Self2015The Late Show with Stephen ColbertTV showas Self - Guest · 1 episodes
2015Lip Sync BattleTV showas Self · 1 episodes
2013CBGBMovieas Terry Ork2011In TimeMovieas Borel2010ConanTV showas Self · as Self - Guest · 1 episodes
2010The TalkTV showas Self · 1 episodes
2009Table for ThreeMovieas Ted2008HancockMovieas Jeremy2007The Big Bang TheoryTV showas Leonard Hofstadter · 279 episodes2005My Name Is EarlTV showas Scott · 1 episodes2005American Dad!TV showas Arnie (voice) · 1 episodes
2005Happy EndingsMovieas Miles (uncredited)
2005The Late Late Show with Craig FergusonTV showas Self · 1 episodes
2004LAXTV showas Leland Pressman · 1 episodes2004EntourageTV showas Johnny Galecki · 3 episodes
2004ChrystalMovieas Barry
2003Hope & FaithTV showas Jay · 3 episodes
2003The Ellen DeGeneres ShowTV showas Self · 1 episodes
2003BookiesMovieas Jude2001Vanilla SkyMovieas Peter Brown
2001Morgan's FerryMovieas Darcy2000BounceMovieas Seth
2000Playing Mona LisaMovieas Arthur
1999The Norm ShowTV showas Dale Stackhouse · 2 episodes1999Family GuyTV showas Leonard Hofstadter (voice) · 1 episodes1999Batman BeyondTV showas Knux (voice) · 1 episodes1998The Opposite of SexMovieas Jason Bock1997I Know What You Did Last SummerMovieas Max Neurick1997Suicide KingsMovieas Ira Reder1997BeanMovieas Stingo Wheelie
1996Murder at My DoorMovieas Teddy McNair
1994Without ConsentMovieas Marty
1993Sudden FuryMovieas Daniel Hannigan
1992BillyTV showas David MacGregor · 13 episodes
1991Civil WarsTV showas Greg Stolbach · 1 episodes
1991Backfield in MotionMovieas Tim Seavers
1990In Defense of a Married ManMovieas Eric
1990American DreamerTV showas Danny Nash · 17 episodes
1990BlossomTV showas Jason · 1 episodes
1990Blind FaithTV showas John Marshall · 2 episodes1989National Lampoon's Christmas VacationMovieas Rusty Griswold
1989PrancerMovieas Billy Quinn
1989HardballTV show1 episodes1988RoseanneTV showas David Healy · 92 episodes
1988A Night in the Life of Jimmy ReardonMovieas Toby Reardon
1987Murder OrdainedMovieas Doug Rule
1981Entertainment TonightTV showas Self · 2 episodes
1975People's Choice AwardsTV showas Self - Presenter · 1 episodes