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