Billionaire Tony Stark (Robert Downey, Jr.) doubles as hero, Iron Man. Beneath the suit, in his own words, he's also a genius, billionaire, playboy and philanthropist. He's got a lot going for him. In many ways, he's the untraditional hero. Everyone is aware of who Iron Man truly is, and in Iron Man 3, Stark abrasively gave the villains his home address, pretty much daring them to try an attack.