Johnny Galecki

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.

Most Known For

Family Guy

as Leonard Hofstadter (voice)

American Dad!

as Arnie (voice)

Conan

as Self

The Big Bang Theory

as Leonard Hofstadter

The Late Late Show with Craig Ferguson

as Self

Entourage

as Johnny Galecki

My Name Is Earl

as Scott

Batman Beyond

as Knux (voice)

The Conners

as David Healy

Lip Sync Battle

as Self

Blossom

as Jason

In Time

as Borel

Stars in the House

as Self

The Norm Show

as Dale Stackhouse

Hancock

as Jeremy

People's Choice Awards

as Self - Presenter

Hope & Faith

as Jay

National Lampoon's Christmas Vacation

as Rusty Griswold

I Know What You Did Last Summer

as Max Neurick

Civil Wars

as Greg Stolbach