Johnny Galecki

Acting

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:

Family Guy American Dad! The Late Late Show with Craig Ferguson The Big Bang Theory Conan Entourage Batman Beyond National Lampoon's Christmas Vacation My Name Is Earl The Conners In Time Without Consent