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.
A supervillain named Megamind defeats and kills his enemy. Out of boredom he creates a superhero who becomes evil, forcing Megamind to turn into a hero.
