Johnny Galecki

Known for

Acting

Born

April 30, 1975 (age 51)

Birthplace

Bree, Belgium

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.

Best known work

The Big Bang Theory

2007

In Time

2011

Hancock

2008

Family Guy

1999

Vanilla Sky

2001

I Know What You Did Last Summer

1997

National Lampoon's Christmas Vacation

1989

Bean

1997

Rings

2017

American Dad!

2005

Filmography

TBA
Peep ShowTV
as Mark (1 episode)
2025
I'm Chevy Chase and You're Not
as Self
2020
The Little Dog Laughed
as Alex
2020
Stars in the HouseTV
as Self (1 episode)
2019
Unraveling the Mystery: A Big Bang Farewell
as Self - Host
2019
A Dog's Journey
as Henry Montgomery
2018
The ConnersTV
as David Healy (4 episodes)
2018
SciJinksTV
as Self - Host (8 episodes), Executive Producer
2018
The Cleanse
as Paul Berger, Producer
2017
Rings
as Gabriel Brown
2016
Must See TV: An All Star Tribute to James Burrows
as Self
2015
The Late Show with Stephen ColbertTV
as Self - Guest (1 episode)
2015
Lip Sync BattleTV
as Self (1 episode)
2013
CBGB
as Terry Ork
2011
In Time
as Borel
2010
ConanTV
as Self (1 episode), as Self - Guest (1 episode)
2010
The TalkTV
as Self (1 episode)
2009
Table for Three
as Ted
2008
Hancock
as Jeremy
2007
The Big Bang TheoryTV
as Leonard Hofstadter (279 episodes)
2007
Boulevard of Broken DreamsTV
as Self (archive footage) (1 episode)
2005
My Name Is EarlTV
as Scott (1 episode)
2005
American Dad!TV
as Arnie (voice) (1 episode)
2005
Happy Endings
as Miles (uncredited)
2005
The Late Late Show with Craig FergusonTV
as Self (1 episode)