better known as Zac Efron, has been a Hollywood star since he was a child. By now, he is approaching the big 'four-oh' (40 years of age) and the evolution of his appearance has been remarkable.

Over the years, Zac Efron has been a staple in Hollywood ... Take a journey down memory lane to see how Efron's hair evolution has changed from a young teen to the man we know and love today.