Nerdy Actors That Turned Out To Be Total Heartthrobs

Zac Efron

Kevin Winter/Getty Images (left), Christopher Polk/Getty Images for MTV (right)

Zac Efron was just a teen when he had a small recurring role on the short-lived WB series Summerland until he became one of the breakout stars of the Disney Channel Original Movie High School Musical, which premiered in 2006. As the lead actor of the film, he captured many tween hearts with his Bieber-esque haircut before Justin Beiber was even famous (the shaggy bowl cut was a thing back then, okay?). But when off the camera, Zac often had his hair unkempt and a terrible sense of style. Fast forward to today and you’ll see that Zac has really grown into his masculinity! With his sculpted body and clean cut hair (finally!), he can now make all women sweat if he walked into a room.