Ortega Planning High School Musical Christmas Special

The actor, 20, is reportedly set to study at the University of Southern California early next year (09) after wrapping up promotional duties for the third and final movie in the series.

But filmmaker Ortega admits he has a few more ideas for the hugely popular teen movie franchise, and hopes to bring the show's main cast - including Efron's girlfriend Vanessa Hudgens and Ashley Tisdale - back together one last time before they bow out for good.

He tells British radio station Heart FM, "We've been talking about it. Steve Vincent, who is Head of Music for ABC and The Disney Channel in the States, came to me earlier this year and came with a load of ideas also including a Christmas album.

"We've also talked about doing a 3D concert movie experience with the cast.

"I've also been talking about the idea of taking High School Musical and transferring the setting to another country... go outside of the US... maybe to the UK. I like that idea. I think it would be a fun experience."