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.
Fancasting for characters who have not yet made a live action appearance in the Marvel Cinematic Universe or have only made a cameo (because some characters appear in the tie-in comics). Feel free to add any Marvel character you want. Once a character has a confirmed actor, they will be removed from this list.
