Notable Role: Thor in Thor (2011)
By the time you revisit this list, Hemsworth will probably already be 30, so let's appreciate his 20s while he's still got a month left. Chris Hemsworth is not just a beefcake. We repeat, Chris Hemsworth is not just a beefcake. He brings more to his manly axe or hammer-wielding roles than just grunts and ginormous muscles; he actually brings talent. If you aren't convinced, check out his upcoming leading movie Rush, in which he plays legendary racecar driver James Hunt.