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.
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
