12. Zac Efron
With hotness oozing from every inch of this actor, it is difficult to think of Zac Efron as the boy from High School Musical. His transformation was fast and impressive. Efron is supposedly inspired by his idol, Bruce Lee, which has helped him gain such high level of physical fitness. Moreover, he draws encouragement from his gym partner, Dwayne Johnson. According to Zac, hard work, dedication, and the ability to overcome old habits has helped him achieve his hunky look.