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.
I invite you to collect as many characters as possible ! Comment them making sure they are not already in the story and I will add it myself (because I prefer the actor to be mentioned with a picture of the person in his role) !
Enjoy !...
