Johnny Galecki

Person

Johnny Galecki

Acting 51 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 Hofst…

IMDb

Known for

Popular titles

The Big Bang Theory

The Big Bang Theory

7.9 2007 TV Show
In Time

In Time

7.0 2011 Movie
The Late Show with Stephen Colbert

The Late Show with Stephen Colbert

6.1 2015 TV Show
Hancock

Hancock

6.4 2008 Movie
Family Guy

Family Guy

7.4 1999 TV Show
American Dad!

American Dad!

7.0 2005 TV Show
The Late Late Show with Craig Ferguson

The Late Late Show with Craig Ferguson

6.8 2005 TV Show
Vanilla Sky

Vanilla Sky

6.8 2001 Movie
I Know What You Did Last Summer

I Know What You Did Last Summer

6.0 1997 Movie
National Lampoon's Christmas Vacation

National Lampoon's Christmas Vacation

7.2 1989 Movie
Bean

Bean

6.5 1997 Movie
Rings

Rings

5.0 2017 Movie

Photos

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Biography

A closer look

Read full 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.

Filmography

Movies and shows, newest first

  1. 2025
    I'm Chevy Chase and You're Not

    Movie Self

  2. 2020
    The Little Dog Laughed

    Movie Alex

  3. 2020
    Stars in the House

    TV show Self

  4. 2019
    Unraveling the Mystery: A Big Bang Farewell

    Movie Self - Host

  5. 2019
    A Dog's Journey

    Movie Henry Montgomery

  6. 2018
    The Conners

    TV show David Healy

  7. 2018
    SciJinks

    TV show Self - Host

  8. 2018
    The Cleanse

    Movie Paul Berger

  9. 2017
    Rings

    Movie Gabriel Brown

  10. 2016
    Must See TV: An All Star Tribute to James Burrows

    Movie Self

  11. 2015
    The Late Show with Stephen Colbert

    TV show Self - Guest

  12. 2015
    Lip Sync Battle

    TV show Self

  13. 2013
    CBGB

    Movie Terry Ork

  14. 2011
    In Time

    Movie Borel

  15. 2010
    Conan

    TV show Self

  16. 2010
    The Talk

    TV show Self

More credits
  1. 2009
    Table for Three

    Movie Ted

  2. 2008
    Hancock

    Movie Jeremy

  3. 2007
    The Big Bang Theory

    TV show Leonard Hofstadter

  4. 2007
    Boulevard of Broken Dreams

    TV show Self (archive footage)

  5. 2005
    My Name Is Earl

    TV show Scott

  6. 2005
    American Dad!

    TV show Arnie (voice)

  7. 2005
    Happy Endings

    Movie Miles (uncredited)

  8. 2005
    The Late Late Show with Craig Ferguson

    TV show Self

  9. 2004
    LAX

    TV show Leland Pressman

  10. 2004
    Entourage

    TV show Johnny Galecki

  11. 2004
    Chrystal

    Movie Barry

  12. 2003
    Hope & Faith

    TV show Jay

  13. 2003
    The Ellen DeGeneres Show

    TV show Self

  14. 2003
    Bookies

    Movie Jude

  15. 2001
    Vanilla Sky

    Movie Peter Brown

  16. 2001
    Morgan's Ferry

    Movie Darcy

  17. 2000
    Bounce

    Movie Seth

  18. 2000
    Playing Mona Lisa

    Movie Arthur

  19. 1999
    The Norm Show

    TV show Dale Stackhouse

  20. 1999
    Family Guy

    TV show Leonard Hofstadter (voice)

  21. 1999
    Batman Beyond

    TV show Knux (voice)

  22. 1998
    The Opposite of Sex

    Movie Jason Bock

  23. 1997
    I Know What You Did Last Summer

    Movie Max Neurick

  24. 1997
    Suicide Kings

    Movie Ira Reder