Acting · Bree, Belgium · Born April 30, 1975
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.
MovieI'm Chevy Chase and You're Not
2025
as Self
MovieThe Little Dog Laughed
2020
as Alex
TVStars in the House
2020
as Self
MovieUnraveling the Mystery: A Big Bang Farewell
2019
as Self - Host
MovieA Dog's Journey
2019
as Henry Montgomery
TVThe Conners
2018
as David Healy
TVSciJinks
2018
as Self - Host
MovieThe Cleanse
2018
as Paul Berger
MovieRings
2017
as Gabriel Brown
MovieMust See TV: An All Star Tribute to James Burrows
2016
as Self
TVThe Late Show with Stephen Colbert
2015
as Self - Guest
TVLip Sync Battle
2015
as Self
MovieCBGB
2013
as Terry Ork
MovieIn Time
2011
as Borel
TVConan
2010
as Self
TVThe Talk
2010
as Self
MovieTable for Three
2009
as Ted
MovieHancock
2008
as Jeremy
TVThe Big Bang Theory
2007
as Leonard Hofstadter
Boulevard of Broken Dreams
2007
as Self (archive footage)
TVMy Name Is Earl
2005
as Scott
TVAmerican Dad!
2005
as Arnie (voice)
MovieHappy Endings
2005
as Miles (uncredited)
TVThe Late Late Show with Craig Ferguson
2005
as Self
TVLAX
2004
as Leland Pressman
TVEntourage
2004
as Johnny Galecki
MovieChrystal
2004
as Barry
TVHope & Faith
2003
as Jay
TVThe Ellen DeGeneres Show
2003
as Self
MovieBookies
2003
as Jude
MovieVanilla Sky
2001
as Peter Brown
MovieMorgan's Ferry
2001
as Darcy
MovieBounce
2000
as Seth
MoviePlaying Mona Lisa
2000
as Arthur
TVThe Norm Show
1999
as Dale Stackhouse
TVFamily Guy
1999
as Leonard Hofstadter (voice)
TVBatman Beyond
1999
as Knux (voice)
MovieThe Opposite of Sex
1998
as Jason Bock
MovieI Know What You Did Last Summer
1997
as Max Neurick
MovieSuicide Kings
1997
as Ira Reder
MovieBean
1997
as Stingo Wheelie
MovieMurder at My Door
1996
as Teddy McNair
MovieWithout Consent
1994
as Marty
MovieSudden Fury
1993
as Daniel Hannigan
TVBilly
1992
as David MacGregor
TVCivil Wars
1991
as Greg Stolbach
MovieBackfield in Motion
1991
as Tim Seavers
MovieIn Defense of a Married Man
1990
as Eric
TVAmerican Dreamer
1990
as Danny Nash
TVBlossom
1990
as Jason
TVBlind Faith
1990
as John Marshall
MovieNational Lampoon's Christmas Vacation
1989
as Rusty Griswold
MoviePrancer
1989
as Billy Quinn
TVHardball
1989
TVRoseanne
1988
as David Healy
MovieA Night in the Life of Jimmy Reardon
1988
as Toby Reardon
MovieMurder Ordained
1987
as Doug Rule
TVEntertainment Tonight
1981
as Self
TVPeople's Choice Awards
1975
as Self - Presenter
Peep Show
as Mark
