'Dr. Who's Matt Smith
At 26 years old, the handsome Brit became the eleventh Dr. Who, the youngest actor to play the role in the show's long history. Though some fans thought he was too youthful for the part, Smith's performance earned him a BAFTA nomination for Best Actor and a legion of admirers. When asked by the Chicago Sun Times about his sex-symbol status in 2012, he said, "I don't quite know what to do with it apart from smile and say — if that is indeed the case — 'Hurrah!' I shall embrace it with open arms." He'll soon bring those looks to the upcoming Terminator reboot, which should only add to his geek cred.