Zac Efron has revealed that he wore a pair of denim jeans for eight continuous weeks in order to get it rugged and dirty for his film High School Musical 3.

The actor said that the pant ultimately lost its stiffness and developed "yellow whiskers" at the front.

"I wore them all throughout High School Musical 3. I even wore them hiking. You have to wear them everywhere to get them right," Us magazine quoted him as telling WWD November 4.

Meanwhile, he has said that he enjoyed watching his own film Me and Orson Welles, for the first time ever.

He told NYLON Guys magazine: "It's the first time I've ever watched a movie [that I'm in] and in the end I'm like 'OK! I didn't check my watch once!"