Zac Efron Plays A Bad Boy In His New Comedy -- Costar Seth Rogen Says Fans Will Be 'Shocked!'

Zac is hoping to ditch his Disney image with a raunchy new role — are you excited or nervous?

Zac Efron has kept his career squeaky-clean, from High School Musical to 17 Again. But Seth Rogen — his costar in an as-yet-untitled new college comedy — says Zac will shock fans with his outrageous new role!

Seth, 29, said Zac, 23, has been amazing to work with, MTV News reports.

“He was really looking to be sullied, which is why we thought it would be a good idea,” he said. “I’ve met him a few times over the years and the first thing you get from him is that he knows that a guy like me would probably hate him, and he works directly to counteract that feeling, which shows an amount of self awareness that is not prevalent among many young stars these days that I’ve met at award shows recently. And I think that’s why I thought it would be really funny, he seemed like he was a really cool guy, that he’d be fun to work with and seemed that he was capable of much more than the Disney stuff we’ve seen him in.”

Seth also said he was shocked at what Zac would agree to.

“He’s the president of a fraternity who really does despicable things, as the president of a fraternity would do,” he said. “We [Seth and his writing/producing partner Evan Goldberg] were just pitching him these ideas, and he was going along with it. We kept looking at each other, like ‘He’s actually going along with this stuff,’ and then he would come up with things that would be pushing it further and we thought, ‘Wow, people are really going to be shocked.’ And so it’s exciting to us.”

What do you think, HollywoodLifers — are you excited to see Zac’s debut as a bad boy?