Actor Zac Efron poses at the 13th annual GQ magazine "Men of the Year" party in Los Angeles November 18, 2008.??[Agencies]

Zac Efron wants to meet Johnny Depp and "pick his brain".

The 'High School Musical' star is determined to shed his clean cut image and become known as a serious actor, just like his idol Johnny.

Zac says he will miss working alongside his girlfriend, 'High School Musical' co-star Vanessa Hudgens, when he moves on to new career challenges.

He explained: "After three movies together, Vanessa and I feel free to do whatever we want, and we're just kind of silly and uninhibited. It felt like the best working vacation I've ever taken."