Genius. Billionaire. Playboy. Philanthropist Tony Stark is all of these things, as he reminded us in "The Avengers." But he forgot to add one more: Our favorite part of the Marvel Cinematic Universe.



When he's not sharing "12 percent of a moment" with Pepper, he's flying nukes through holes in space or battling baddies that can (naturally) breathe fire. And he literally has a flying metal suit for every occasion. Which is never not awesome.



The only thing cooler than Iron Man is the actor who plays him. In honor of RDJ's birthday, here are all the times Iron Man proved to be the best part of the MCU. You're welcome.