Johnny Galecki
Known for acting · Born 30 April 1975 · 51 · Bree, Belgium
62 credits
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.
Known for
The Big Bang Theory
2007
Roseanne
1988
Rings
2017
I Know What You Did Last Summer
1997
National Lampoon's Christmas Vacation
1989
In Time
2011
Hancock
2008
Bounce
2000
The Cleanse
2018
Suicide Kings
1997
The Opposite of Sex
1998
CBGB
2013
Acting (60)
2025I'm Chevy Chase and You're NotSelfFilm
2020The Little Dog LaughedAlexFilm
2020Stars in the HouseSelfSeries
2019A Dog's JourneyHenry MontgomeryFilm
2019Unraveling the Mystery: A Big Bang FarewellSelf - HostFilm
2018The ConnersDavid Healy · 4 episodesSeries
2018The CleansePaul BergerFilm
2018SciJinksSelf - Host · 8 episodesSeries
2017RingsGabriel BrownFilm
2016Must See TV: An All Star Tribute to James BurrowsSelfFilm
2015The Late Show with Stephen ColbertSelf - GuestSeries
2015Lip Sync BattleSelfSeries
2013CBGBTerry OrkFilm
2011In TimeBorelFilm
2010ConanSelf, Self - GuestSeries
2010The TalkSelfSeries
2009Table for ThreeTedFilm
2008HancockJeremyFilm
2007The Big Bang TheoryLeonard Hofstadter · 279 episodesSeries
2007Boulevard of Broken DreamsSelf (archive footage)Series
2005American Dad!Arnie (voice)Series
2005My Name Is EarlScottSeries
2005The Late Late Show with Craig FergusonSelfSeries
2005Happy EndingsMiles (uncredited)Film
2004EntourageJohnny Galecki · 3 episodesSeries
2004ChrystalBarryFilm
2004LAXLeland PressmanSeries
2003The Ellen DeGeneres ShowSelfSeries
2003BookiesJudeFilm
2003Hope & FaithJay · 3 episodesSeries
2001Vanilla SkyPeter BrownFilm
2001Morgan's FerryDarcyFilm
2000BounceSethFilm
2000Playing Mona LisaArthurFilm
1999Family GuyLeonard Hofstadter (voice)Series
1999Batman BeyondKnux (voice)Series
1999The Norm ShowDale Stackhouse · 2 episodesSeries
1998The Opposite of SexJason BockFilm
1997I Know What You Did Last SummerMax NeurickFilm
1997BeanStingo WheelieFilm
1997Suicide KingsIra RederFilm
1996Murder at My DoorTeddy McNairFilm
1994Without ConsentMartyFilm
1993Sudden FuryDaniel HanniganFilm
1992BillyDavid MacGregor · 13 episodesSeries
1991Backfield in MotionTim SeaversFilm
1991Civil WarsGreg StolbachSeries
1990BlossomJasonSeries
1990In Defense of a Married ManEricFilm
1990Blind FaithJohn Marshall · 2 episodesSeries
1990American DreamerDanny Nash · 17 episodesSeries
1989National Lampoon's Christmas VacationRusty GriswoldFilm
1989PrancerBilly QuinnFilm
1989HardballSeries
1988RoseanneDavid Healy · 92 episodesSeries
1988A Night in the Life of Jimmy ReardonToby ReardonFilm
1987Murder OrdainedDoug RuleFilm
1981Entertainment TonightSelf · 2 episodesSeries
1975People's Choice AwardsSelf - PresenterSeries
—Peep ShowMarkSeries
Production (2)
2018The CleanseProducerFilm
2018SciJinksExecutive ProducerSeries