Zac Efron

This kid has been the face of Disney and it's money minting business for a while now. Although Zac started his career by doing hordes of roles in series like ER, Firefly, The Guardian, etc. his true break came with Disney's High School Musical. Initially he had low expectations from the movie that ultimately catapulted him to instant international fame. If that wasn't enough, he went on to win Teen Choice Award in the Breakout Star and the TV — Choice Chemistry with his co-star Vanessa Hudgens. He also went ahead and starred in the following two High School Musical sequels. 

Of course, now that he has matured, he has taken up some challenging and serious roles and has been faring well for himself.