Johnny Galecki

Johnny Galecki

Acting

Born April 30, 1975 · Bree, Belgium

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

Hancock
Hancock
2008
Vanilla Sky
Vanilla Sky
2001
In Time
In Time
2011
A Dog's Journey
A Dog's Journey
2019
Bean
Bean
1997
National Lampoon's Christmas Vacation
National Lampoon's Christmas Vacation
1989
I Know What You Did Last Summer
I Know What You Did Last Summer
1997
Rings
Rings
2017

Filmography

I'm Chevy Chase and You're Not
I'm Chevy Chase and You're Not
2025 · Self
A Dog's Journey
A Dog's Journey
2019 · Henry Montgomery
The Cleanse
The Cleanse
2018 · Paul Berger
Rings
Rings
2017 · Gabriel Brown
Must See TV: An All Star Tribute to James Burrows
Must See TV: An All Star Tribute to James Burrows
2016 · Self
CBGB
CBGB
2013 · Terry Ork
In Time
In Time
2011 · Borel
Table for Three
Table for Three
2009 · Ted
Hancock
Hancock
2008 · Jeremy
Happy Endings
Happy Endings
2005 · Miles (uncredited)
Chrystal
Chrystal
2004 · Barry
Bookies
Bookies
2003 · Jude
Vanilla Sky
Vanilla Sky
2001 · Peter Brown
Playing Mona Lisa
Playing Mona Lisa
2000 · Arthur
Bounce
Bounce
2000 · Seth
The Opposite of Sex
The Opposite of Sex
1998 · Jason Bock
Bean
Bean
1997 · Stingo Wheelie
I Know What You Did Last Summer
I Know What You Did Last Summer
1997 · Max Neurick
Suicide Kings
Suicide Kings
1997 · Ira Reder
Without Consent
Without Consent
1994 · Marty
Sudden Fury
Sudden Fury
1993 · Daniel Hannigan
In Defense of a Married Man
In Defense of a Married Man
1990 · Eric
National Lampoon's Christmas Vacation
National Lampoon's Christmas Vacation
1989 · Rusty Griswold
Prancer
Prancer
1989 · Billy Quinn
A Night in the Life of Jimmy Reardon
A Night in the Life of Jimmy Reardon
1988 · Toby Reardon