Acting

Johnny Galecki

Born 1975-04-30 · 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 Theory.

Credits

Newest first

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