Funnyman Seth Rogen says he's been crushing on his co-star, the Knocked Up actor revealed PEOPLEat the second annual Hilarity For Charity House Party in Los Angeles. No big deal, except that his co-star is Zac Efron.
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Married to actress Lauren Miller, Rogen, 31, jokes that he can appreciate Efron's body.
"Zac Efron is incredibly handsome. He's the sexiest [expletive] on the planet!"
Rogen and Efron star alongside Rose Byrne, Dave Franco, and Lisa Kudrow in the frat boy movie, Townies.
"I did a scene with him, and we're both shirtless, and it was a very humbling experience," Rogen laughs. "I marveled at the fact that we're literally the same species."
The only way Rogen says he out-mans Efron is when it comes to man hair.
"I'm hairier than he is, so I win at that," Rogen told PEOPLE.
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Townies has been shooting in Los Angeles and is set to release in 2014.