15 Superstars Who've Played Superheroes (PHOTOS)

Robert Downey Jr. charms as rakish billionaire genius Tony Stark in Iron Man (2008), Iron Man 2 (2010), and The Avengers (2012). Honestly, is there anything sexier than a man who uses his brains to manufacture brawn? Tony’s personal assistant Pepper Potts (Gwyneth Paltrow) wouldn’t be one to disagree.

Good news: The iron-clad superstar will reprise his super role in 2013’s Iron Man 3.