Zac Efron's good looks are not lost on his Townies co-star Seth Rogen.

Rogen was asked about Efron recently at the second annual Hilarity For Charity House Party in Los Angeles and he didn't hold back.

'Zac Efron is incredibly handsome,' Rogen said. 'He's the sexiest [expletive] on the planet!'

At 31, Rogen is only six years older than Efron but that was of little help when it came to filming certain scenes of the comedy.