The word on the street is that Sean “Diddy” Combs is the McLovin (“Super Bad”) of “Get Him to the Greek!”  Jonah Hill says, “I think Diddy’s going to really shock people…Every time he breathes in the movie, it garners a huge laugh.”

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On the Las Vegas set of “Get Him to the Greek“ last May, Diddy told MTV News that in his role as an eccentric record label boss opposite comedy vets Russell Brand and Jonah Hill, he hoped to be “a surprise within the recipe.”

That’s exactly Jonah Hill’s view as well, going so far as to compare Diddy’s performance to Christopher Mintz-Plasse’s scene-stealing nerd in “Superbad.”

“I think Diddy’s going to really shock people,” Hill told MTV News at South by Southwest in Austin. “We were saying Diddy’s kind of the McLovin of ‘Get Him to the Greek.’ You don’t know what he’s going to do. Every time he breathes in the movie, it garners a huge laugh.”

In “Greek,” the man sometimes known as Sean Combs returns to comedic territory for the first time since 2001′s “Made.” In the years since, he’s stuck to dramatic material in films like the Oscar-winning “Monster’s Ball” and the made-for-TV adaptation of ”A Raisin in the Sun.” But Diddy’s comedic chops were anything but rusty for “Greek,” as producer Judd Apatow found out during rehearsals.

“We did a table read, and I thought to myself, ‘I wonder how funny [Sean's] going to be and how much help he’s going to need,’” Apatow told us last year. “And I found out the answer was none. He needs no help. He was riotously funny. As a man with one skill, I was annoyed that he was also funny. You shouldn’t be allowed to be good at so many things.”

At SXSW, Hill identified the key to Diddy’s scene-stealing turn: his willingness to take risks and present himself in a way that the public has never seen before. Failure of expectation, after all, is the essential ingredient to making people laugh.

There are certain points where he gets a round of applause of just shock that he’s so funny in the movie,” Hill said. “His image is so serious and rapper and mogul kind of guy, I think he was really brave in deconstructing his image for this movie.”