Johnny Galecki

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

Family Guy

American Dad!

The Late Show with Stephen Colbert

Conan

Conan

The Big Bang Theory

The Late Late Show with Craig Ferguson

Entourage

All Movies (31)

• I'm Chevy Chase and You're Not2025 · as Self
• The Little Dog Laughed2020 · as Alex
• Unraveling the Mystery: A Big Bang Farewell2019 · as Self - Host
• A Dog's Journey2019 · as Henry Montgomery
• The Cleanse2018 · as Paul Berger
• Rings2017 · as Gabriel Brown
• Must See TV: An All Star Tribute to James Burrows2016 · as Self
• CBGB2013 · as Terry Ork
• In Time2011 · as Borel
• Table for Three2009 · as Ted
• Hancock2008 · as Jeremy
• Happy Endings2005 · as Miles (uncredited)
• Chrystal2004 · as Barry
• Bookies2003 · as Jude
• Vanilla Sky2001 · as Peter Brown
• Morgan's Ferry2001 · as Darcy
• Bounce2000 · as Seth
• Playing Mona Lisa2000 · as Arthur
• The Opposite of Sex1998 · as Jason Bock
• I Know What You Did Last Summer1997 · as Max Neurick
• Suicide Kings1997 · as Ira Reder
• Bean1997 · as Stingo Wheelie
• Murder at My Door1996 · as Teddy McNair
• Without Consent1994 · as Marty
• Sudden Fury1993 · as Daniel Hannigan
• Backfield in Motion1991 · as Tim Seavers
• In Defense of a Married Man1990 · as Eric
• National Lampoon's Christmas Vacation1989 · as Rusty Griswold
• Prancer1989 · as Billy Quinn
• A Night in the Life of Jimmy Reardon1988 · as Toby Reardon
• Murder Ordained1987 · as Doug Rule

All TV Shows (29)

• Stars in the House2020 · as Self
• The Conners2018 · as David Healy
• SciJinks2018 · as Self - Host
• The Late Show with Stephen Colbert2015 · as Self - Guest
• Lip Sync Battle2015 · as Self
• Conan2010 · as Self
• Conan2010 · as Self - Guest
• The Big Bang Theory2007 · as Leonard Hofstadter
• Boulevard of Broken Dreams2007 · as Self (archive footage)
• My Name Is Earl2005 · as Scott
• American Dad!2005 · as Arnie (voice)
• The Late Late Show with Craig Ferguson2005 · as Self
• LAX2004 · as Leland Pressman
• Entourage2004 · as Johnny Galecki
• Hope & Faith2003 · as Jay
• The Ellen DeGeneres Show2003 · as Self
• The Norm Show1999 · as Dale Stackhouse
• Family Guy1999 · as Leonard Hofstadter (voice)
• Batman Beyond1999 · as Knux (voice)
• Billy1992 · as David MacGregor
• Civil Wars1991 · as Greg Stolbach
• American Dreamer1990 · as Danny Nash
• Blossom1990 · as Jason
• Blind Faith1990 · as John Marshall
• Hardball1989
• Roseanne1988 · as David Healy
• Entertainment Tonight1981 · as Self
• People's Choice Awards1975 · as Self - Presenter
• Peep Show— · as Mark