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.
In Time
as Borel
Hancock
as Jeremy
I'm Chevy Chase and You're Not
as Self
The Little Dog Laughed
as Alex
Unraveling the Mystery: A Big Bang Farewell
as Self - Host
A Dog's Journey
as Henry Montgomery
The Cleanse
as Paul Berger
Rings
as Gabriel Brown
Must See TV: An All Star Tribute to James Burrows
CBGB
as Terry Ork
Table for Three
as Ted
Happy Endings
as Miles (uncredited)
Chrystal
as Barry
Bookies
as Jude
Vanilla Sky
as Peter Brown
Morgan's Ferry
as Darcy
Bounce
as Seth
Playing Mona Lisa
as Arthur
The Opposite of Sex
as Jason Bock
I Know What You Did Last Summer
as Max Neurick
Suicide Kings
as Ira Reder
Bean
as Stingo Wheelie
Murder at My Door
as Teddy McNair
Without Consent
as Marty
Sudden Fury
as Daniel Hannigan
Backfield in Motion
as Tim Seavers
In Defense of a Married Man
as Eric
National Lampoon's Christmas Vacation
as Rusty Griswold
Prancer
as Billy Quinn
A Night in the Life of Jimmy Reardon
as Toby Reardon
Murder Ordained
as Doug Rule