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
TV
Family Guy
Leonard Hofstadter (voice)
1999
TV
American Dad!
Arnie (voice)
2005
TV
The Late Late Show with Craig Ferguson
Self
2005
TV
Conan
Self
2010
TV
Hope & Faith
Jay
2003
TV
Entourage
Johnny Galecki
2004
TV
The Big Bang Theory
Leonard Hofstadter
2007
TV
My Name Is Earl
Scott
2005
TV
Batman Beyond
Knux (voice)
1999
TV
Blossom
Jason
1990
TV
Stars in the House
Self
2020
TV
Lip Sync Battle
Self
2015
TV
People's Choice Awards
Self - Presenter
1975
TV
The Conners
David Healy
2018
TV
Roseanne
David Healy
1988
TV
Civil Wars
Greg Stolbach
1991
TV
Entertainment Tonight
Self
1981
Film
In Time
Borel
2011
Film
Hancock
Jeremy
2008
TV
LAX
Leland Pressman
2004
Filmography
2025FilmI'm Chevy Chase and You're Notas Self2020FilmThe Little Dog Laughedas Alex2020TVStars in the Houseas Self2019FilmUnraveling The Mystery: A Big Bang Farewellas Self - Host2019FilmA Dog's Journeyas Henry Montgomery2018TVThe Connersas David Healy2018TVSciJinksas Self - Host2018FilmThe Cleanseas Paul Berger2017FilmRingsas Gabriel Brown2016FilmMust See TV: An All Star Tribute to James Burrowsas Self2015TVPeep Showas Mark2015TVLip Sync Battleas Self2013FilmCBGBas Terry Ork2011FilmIn Timeas Borel2010TVConanas Self2009FilmTable for Threeas Ted2008FilmHancockas Jeremy2007TVThe Big Bang Theoryas Leonard Hofstadter2007TVBoulevard of Broken Dreamsas Self (archive footage)2005TVMy Name Is Earlas Scott2005TVAmerican Dad!as Arnie (voice)2005FilmHappy Endingsas Miles (uncredited)2005TVThe Late Late Show with Craig Fergusonas Self2004TVLAXas Leland Pressman2004TVEntourageas Johnny Galecki2004FilmChrystalas Barry2003TVHope & Faithas Jay2003FilmBookiesas Jude2001FilmVanilla Skyas Peter Brown2001FilmMorgan's Ferryas Darcy2000FilmBounceas Seth2000FilmPlaying Mona Lisaas Arthur1999TVThe Norm Showas Dale Stackhouse1999TVFamily Guyas Leonard Hofstadter (voice)1999TVBatman Beyondas Knux (voice)1998FilmThe Opposite of Sexas Jason Bock1997FilmI Know What You Did Last Summeras Max Neurick1997FilmSuicide Kingsas Ira Reder1997FilmBeanas Stingo Wheelie1996FilmMurder at My Dooras Teddy McNair1994FilmWithout Consentas Marty1993FilmSudden Furyas Daniel Hannigan1992TVBillyas David MacGregor1991TVCivil Warsas Greg Stolbach1991FilmBackfield in Motionas Tim Seavers1990FilmIn Defense of a Married Manas Eric1990TVAmerican Dreameras Danny Nash1990TVBlossomas Jason1990TVBlind Faithas John Marshall1989FilmNational Lampoon's Christmas Vacationas Rusty Griswold1989FilmPranceras Billy Quinn1989TVHardball1988TVRoseanneas David Healy1988FilmA Night in the Life of Jimmy Reardonas Toby Reardon1987FilmMurder Ordainedas Doug Rule1981TVEntertainment Tonightas Self1975TVPeople's Choice Awardsas Self - Presenter