By Andrea Towers
May 06, 2015 at 03:46 PM EDT
Zade Rosenthal

Avengers: Age of Ultron opened to massive box-office numbers last week, as everyone’s favorite group of superheroes teamed up to once again save the world—this time from a giant, deadly robot voiced by James Spader. And at the center of it all? Ultron’s creator, otherwise known as Iron Man himself: Tony Stark.

While the Avengers world is filled with popular and recognizable characters such as Captain America and Thor, you can’t talk about the Marvel Cinematic Universe without making reference to Robert Downey Jr., who has been front and center since 2008’s Iron Man kicked off the wave of Avengers movies. A certified “genius, billionaire, playboy, philanthropist,” it’s no secret that Downey’s personality might as well be his superhero alter ego in disguise (just check out some footage from the latest press tour). So in celebration of Age of Ultron’s release, we invite you to test your knowledge and determine just how well you know the real Iron Man from the person who plays him by taking EW’s “who said it?” quiz.

And don’t worry, we won’t hold it against you if you mess up. Even Iron Man has his off days.