Johnny Galecki
Acting
Born: 1975-04-30 · Bree, Belgium
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.
🎬 Movies (20)
I'm Chevy Chase and You're Not
2025
Self
The Little Dog Laughed
2020
Alex
Unraveling the Mystery: A Big Bang Farewell
2019
Self - Host
A Dog's Journey
2019
Henry Montgomery
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
Vanilla Sky
2001
Peter Brown
Morgan's Ferry
2001
Darcy
Bounce
2000
Seth
Playing Mona Lisa
2000
Arthur
The Opposite of Sex
1998
Jason Bock
I Know What You Did Last Summer
1997
Max Neurick
📺 TV Shows (20)
Stars in the House
2020
Self
The Conners
2018
David Healy
SciJinks
2018
Self - Host
The Late Show with Stephen Colbert
2015
Self - Guest
Lip Sync Battle
2015
Self
Conan
2010
Self
Conan
2010
Self - Guest
The Big Bang Theory
2007
Leonard Hofstadter
Boulevard of Broken Dreams
2007
Self (archive footage)
My Name Is Earl
2005
Scott
American Dad!
2005
Arnie (voice)
The Late Late Show with Craig Ferguson
2005
Self
LAX
2004
Leland Pressman
Entourage
2004
Johnny Galecki
Hope & Faith
2003
Jay
The Ellen DeGeneres Show
2003
Self
The Norm Show
1999
Dale Stackhouse
Family Guy
1999
Leonard Hofstadter (voice)
Batman Beyond
1999
Knux (voice)
Billy
1992
David MacGregor