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Robert Pattinson, Zac Efron

Eduardo Parra/Getty Images; Jon Kopaloff/Getty Images

The Oscars are taking a dip into the fountain of youth.

Fresh off the news that Robert Pattinson is going to be a presenter at this year's awards show on Sunday, I'm told that Zac Efron will be doing the same.

Sources tell me the High School Musical hottie will present Best Original Song during ABC's live telecast from Hollywood's Kodak Theatre.

Who will be by Pattinson's and Efron's side?

No one is saying right now, but we wouldn't be surprised if Pattinson's Twilight costar Kristen Stewart and Efron's real-life HSM girlfriend, Vanessa Hudgens, were also in attendance.

And there's more from the Oscars teen scene: I'm told Miley Cyrus will be there, too, but she won't be presenting like she did last year. The Hannah Montana star is going to support her box-office hit Bolt, which is up for Best Animated Feature, sources reveal.

No word if Cyrus' underwear model-actor boyfriend, Justin Gaston, will be her date for the evening.

Reps for the stars and the awards show did not comment.