Nerdy Actors That Turned Out To Be Total Heartthrobs

John Mayer

Paul Natkin/WireImage via Getty Images (left), Jason Merritt/Getty Images (right)

Okay, so truthfully, John Mayer isn’t an actor but he has appeared on television! He’s guest starred on shows such as CSI: Crime Scene Investigation, but of course he was playing his own music. Still, it’s got to count for something, right? Either way, we couldn’t have a list of celebrities who’ve gone from nerdy to heartthrob and not include John Mayer. Just look at his picture on the left! He looks far from the guitar-playing swoon-worthy singer he is today. But soon you’ll see what other singer-turned-actor has made this list and trust us when we say that Mayer’s transformation cannot even compare.