Johnny Galecki

Johnny Galecki

Acting

Born April 30, 1975 · Bree, Belgium

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…

Known for

Family Guy

Family Guy

1999

The Late Show with Stephen Colbert

The Late Show with Stephen Colbert

2015

Conan

Conan

2010

Conan

Conan

2010

American Dad!

American Dad!

2005

The Late Late Show with Craig Ferguson

The Late Late Show with Craig Ferguson

2005

The Talk

The Talk

2010

The Big Bang Theory

The Big Bang Theory

2007

Acting(60)

2025I'm Chevy Chase and You're NotSelf

2020The Little Dog LaughedAlex

2020Stars in the HouseSelf

2019Unraveling the Mystery: A Big Bang FarewellSelf - Host

2019A Dog's JourneyHenry Montgomery

2018The ConnersDavid Healy

2018SciJinksSelf - Host

2018The CleansePaul Berger

2017RingsGabriel Brown

2016Must See TV: An All Star Tribute to James BurrowsSelf

2015The Late Show with Stephen ColbertSelf - Guest

2015Lip Sync BattleSelf

2013CBGBTerry Ork

2011In TimeBorel

2010The TalkSelf

2009Table for ThreeTed

2008HancockJeremy

2007The Big Bang TheoryLeonard Hofstadter

2007Boulevard of Broken DreamsSelf (archive footage)

2005My Name Is EarlScott

2005American Dad!Arnie (voice)

2005Happy EndingsMiles (uncredited)

2005The Late Late Show with Craig FergusonSelf

2004LAXLeland Pressman

2004EntourageJohnny Galecki

2004ChrystalBarry

2003Hope & FaithJay

2003The Ellen DeGeneres ShowSelf

2003BookiesJude

2001Vanilla SkyPeter Brown

2001Morgan's FerryDarcy

2000Playing Mona LisaArthur

1999The Norm ShowDale Stackhouse

1999Family GuyLeonard Hofstadter (voice)

1999Batman BeyondKnux (voice)

1998The Opposite of SexJason Bock

1997I Know What You Did Last SummerMax Neurick

1997Suicide KingsIra Reder

1997BeanStingo Wheelie

1996Murder at My DoorTeddy McNair

1994Without ConsentMarty

1993Sudden FuryDaniel Hannigan

1992BillyDavid MacGregor

1991Civil WarsGreg Stolbach

1991Backfield in MotionTim Seavers

1990In Defense of a Married ManEric

1990American DreamerDanny Nash

1990BlossomJason

1990Blind FaithJohn Marshall

1989National Lampoon's Christmas VacationRusty Griswold

1989PrancerBilly Quinn

1988RoseanneDavid Healy

1988A Night in the Life of Jimmy ReardonToby Reardon

1987Murder OrdainedDoug Rule

1981Entertainment TonightSelf

1975People's Choice AwardsSelf - Presenter

Johnny Galecki — Watchpile | Watchpile