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.

Known For

In Time

Borel

Hancock

Jeremy

National Lampoon's Christmas Vacation

Rusty Griswold

Vanilla Sky

Peter Brown

I Know What You Did Last Summer

Max Neurick

A Dog's Journey

Henry Montgomery

Bean

Stingo Wheelie

Rings

Gabriel Brown