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. ...read more

Known For

Bean

I Know What You Did Last Summer

National Lampoon's Christmas Vacation

Hancock

The Opposite of Sex

Bookies

A Night in the Life of Jimmy Reardon

In Time

Morgan's Ferry

Playing Mona Lisa

CBGB

Murder at My Door

Vanilla Sky

Sudden Fury

Backfield in Motion

The Cleanse

Bounce

Rings

Murder Ordained

Must See TV: An All Star Tribute to James Burrows

Without Consent

Suicide Kings

Prancer

Happy Endings

Chrystal

In Defense of a Married Man

The Little Dog Laughed

A Dog's Journey

Table for Three

Unraveling The Mystery: A Big Bang Farewell

I'm Chevy Chase and You're Not

American Dreamer

Batman Beyond

The Big Bang Theory

American Dad!

Family Guy

Hope & Faith

My Name Is Earl

Roseanne

Billy

LAX

Blossom

Hardball

Civil Wars

Lip Sync Battle

The Late Late Show with Craig Ferguson

Blind Faith

Boulevard of Broken Dreams

SciJinks

The Conners

Entertainment Tonight

Stars in the House

Conan

The Norm Show

Entourage

People's Choice Awards

Peep Show