Johnny Galecki
Acting
60
Acting Credits
Biography
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
Filmography
I'm Chevy Chase and You're Not
2025
as Self
The Little Dog Laughed
2020
as Alex
Stars in the House
2020
as Self
A Dog's Journey
2019
as Henry Montgomery
Unraveling the Mystery: A Big Bang Farewell
2019
as Self - Host
The Cleanse
2018
as Paul Berger
SciJinks
2018
as Self - Host
The Conners
2018
as David Healy
Rings
2017
as Gabriel Brown
Must See TV: An All Star Tribute to James Burrows
2016
as Self
Lip Sync Battle
2015
as Self
The Late Show with Stephen Colbert
2015
as Self - Guest
CBGB
2013
as Terry Ork
In Time
2011
as Borel
Conan
2010
as Self
Conan
2010
as Self - Guest
The Talk
2010
as Self
Table for Three
2009
as Ted
Hancock
2008
as Jeremy
The Big Bang Theory
2007
as Leonard Hofstadter
Boulevard of Broken Dreams
2007
as Self (archive footage)
Happy Endings
2005
as Miles (uncredited)
American Dad!
2005
as Arnie (voice)
My Name Is Earl
2005
as Scott
The Late Late Show with Craig Ferguson
2005
as Self
Chrystal
2004
as Barry
LAX
2004
as Leland Pressman
Entourage
2004
as Johnny Galecki
Bookies
2003
as Jude
Hope & Faith
2003
as Jay
The Ellen DeGeneres Show
2003
as Self
Morgan's Ferry
2001
as Darcy
Vanilla Sky
2001
as Peter Brown
Playing Mona Lisa
2000
as Arthur
Bounce
2000
as Seth
Batman Beyond
1999
as Knux (voice)
Family Guy
1999
as Leonard Hofstadter (voice)
The Norm Show
1999
as Dale Stackhouse
The Opposite of Sex
1998
as Jason Bock
Bean
1997
as Stingo Wheelie
I Know What You Did Last Summer
1997
as Max Neurick
Suicide Kings
1997
as Ira Reder
Murder at My Door
1996
as Teddy McNair
Without Consent
1994
as Marty
Sudden Fury
1993
as Daniel Hannigan
Billy
1992
as David MacGregor
Backfield in Motion
1991
as Tim Seavers
Civil Wars
1991
as Greg Stolbach
In Defense of a Married Man
1990
as Eric
American Dreamer
1990
as Danny Nash
Blossom
1990
as Jason
Blind Faith
1990
as John Marshall
National Lampoon's Christmas Vacation
1989
as Rusty Griswold
Prancer
1989
as Billy Quinn
Hardball
1989
A Night in the Life of Jimmy Reardon
1988
as Toby Reardon
Roseanne
1988
as David Healy
Murder Ordained
1987
as Doug Rule
Entertainment Tonight
1981
as Self
People's Choice Awards
1975
as Self - Presenter