Johnny Galecki

Acting

Johnny Galecki

Born April 30, 1975Bree, Belgium58 credits

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

I'm Chevy Chase and You're Not
7.1

I'm Chevy Chase and You're Not

Movie

2025

The Little Dog Laughed

The Little Dog Laughed

Movie

2020

Stars in the House

Stars in the House

TV

2020

Unraveling The Mystery: A Big Bang Farewell

Unraveling The Mystery: A Big Bang Farewell

Movie

2019

A Dog's Journey
8.1

A Dog's Journey

Movie

2019

The Conners
7.1

The Conners

TV

2018

Filmography

I'm Chevy Chase and You're Not
2025I'm Chevy Chase and You're Notas SelfMovie
The Little Dog Laughed
2020The Little Dog Laughedas AlexMovie
Stars in the House
2020Stars in the Houseas SelfTV
Unraveling The Mystery: A Big Bang Farewell
2019Unraveling The Mystery: A Big Bang Farewellas Self - HostMovie
A Dog's Journey
2019A Dog's Journeyas Henry MontgomeryMovie
The Conners
2018The Connersas David HealyTV
SciJinks
2018SciJinksas Self - HostTV
The Cleanse
2018The Cleanseas Paul BergerMovie
Rings
2017Ringsas Gabriel BrownMovie
Must See TV: An All Star Tribute to James Burrows
2016Must See TV: An All Star Tribute to James Burrowsas SelfMovie
The Late Show with Stephen Colbert
2015The Late Show with Stephen Colbertas Self - GuestTV
Lip Sync Battle
2015Lip Sync Battleas SelfTV
CBGB
2013CBGBas Terry OrkMovie
In Time
2011In Timeas BorelMovie
Conan
2010Conanas SelfTV
Table for Three
2009Table for Threeas TedMovie
Hancock
2008Hancockas JeremyMovie
The Big Bang Theory
2007The Big Bang Theoryas Leonard HofstadterTV
B
2007Boulevard of Broken Dreamsas Self (archive footage)TV
My Name Is Earl
2005My Name Is Earlas ScottTV
American Dad!
2005American Dad!as Arnie (voice)TV
Happy Endings
2005Happy Endingsas Miles (uncredited)Movie
The Late Late Show with Craig Ferguson
2005The Late Late Show with Craig Fergusonas SelfTV
LAX
2004LAXas Leland PressmanTV
Entourage
2004Entourageas Johnny GaleckiTV
Chrystal
2004Chrystalas BarryMovie
Hope & Faith
2003Hope & Faithas JayTV
Bookies
2003Bookiesas JudeMovie
Vanilla Sky
2001Vanilla Skyas Peter BrownMovie
Morgan's Ferry
2001Morgan's Ferryas DarcyMovie
Bounce
2000Bounceas SethMovie
Playing Mona Lisa
2000Playing Mona Lisaas ArthurMovie
The Norm Show
1999The Norm Showas Dale StackhouseTV
Family Guy
1999Family Guyas Leonard Hofstadter (voice)TV
Batman Beyond
1999Batman Beyondas Knux (voice)TV
The Opposite of Sex
1998The Opposite of Sexas Jason BockMovie
I Know What You Did Last Summer
1997I Know What You Did Last Summeras Max NeurickMovie
Suicide Kings
1997Suicide Kingsas Ira RederMovie
Bean
1997Beanas Stingo WheelieMovie
Murder at My Door
1996Murder at My Dooras Teddy McNairMovie
Without Consent
1994Without Consentas MartyMovie
Sudden Fury
1993Sudden Furyas Daniel HanniganMovie
Billy
1992Billyas David MacGregorTV
Civil Wars
1991Civil Warsas Greg StolbachTV
Backfield in Motion
1991Backfield in Motionas Tim SeaversMovie
In Defense of a Married Man
1990In Defense of a Married Manas EricMovie
American Dreamer
1990American Dreameras Danny NashTV
Blossom
1990Blossomas JasonTV
Blind Faith
1990Blind Faithas John MarshallTV
National Lampoon's Christmas Vacation
1989National Lampoon's Christmas Vacationas Rusty GriswoldMovie
Prancer
1989Pranceras Billy QuinnMovie
Hardball
1989HardballTV
Roseanne
1988Roseanneas David HealyTV
A Night in the Life of Jimmy Reardon
1988A Night in the Life of Jimmy Reardonas Toby ReardonMovie
Murder Ordained
1987Murder Ordainedas Doug RuleMovie
Entertainment Tonight
1981Entertainment Tonightas SelfTV
People's Choice Awards
1975People's Choice Awardsas Self - PresenterTV
P
—Peep Showas MarkTV