Family Guy Wiki

Johnny Galecki

5,970pages on
this wiki
Add New Page
Talk0 Share
Fg big bang theory

John Mark "Johnny" Galecki (born April 30, 1975) is an American actor. He is best known for his roles as David Healy in the sitcom Roseanne, Rusty Griswold in National Lampoon's Christmas Vacation, and as Leonard Hofstadter, Ph.D, in the CBS sitcom The Big Bang Theory.

Galecki reprises his role as Hofstadter in "Business Guy" in an episode of The Big Bang Theory.