Showbiz
Rex Features
The teen heartthrob is keen to be viewed as a serious performer and showcase his skills on the London stage.
A source said: "Zac wants to prove what a real actor he is. He wants to show off his full range of talents."
Efron starred in 2007 musical Hairspray as well as two instalments of Disney's smash-hit High School Musical franchise. The third movie is scheduled for release in October.
He has also branched out into non-singing roles, including upcoming period drama Me And Orson Welles and Matthew Perry age-switch comedy Seventeen Again.
> Efron discusses 'High School Musical 3'
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