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Robert Pattinson, Charlie Sheen

AP Photo/Matt Sayles; Jason Merritt/Getty Images

Where in the world will Robert Pattinson be on Sunday?

Not at the MTV Movie Awards!


While his girlfriend Kristen Stewart will be on hand to present with her Snow White and the Huntsman costar Chris Hemsworth, I'm told Mr. Pattinson will be MIA this year.

Who will be making a surprise appearance? Charlie Sheen!

In a nod to his past party-boy image, Sheen will introduce a tribute to—what else?—party flicks.

"Even though Charlie has cleaned up his act, he still has a sense of humor about his out-of-control days," a show source exclusively tells E! News.

And there's more—Sheen will be introducing musical act Wiz Khalifa, who was recently arrested for pot possession.

Another source said, "It's all going to be a really big party moment."

Hosted by Russell Brand, the golden-popcorn award show's other presenters include Emma Watson, Andrew Garfield, Channing Tatum, Matthew McConaughey, Adam Sandler, Andy Samberg, Leighton Meester, Logan Lerman and Ezra Miller.

The Black Keys and fun will also perform.