Zac Efron in His Underwear on the Set of Dirty Grandpa

So Zac Efron's Dirty Grandpa Jockstrap Is Up For Auction… Dare We

Dirty Grandpa Exclusive Clip (2016)

See Zac Efron In His Underwear & A Crop Top!

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Zac Efron checks out a bikini babe on set of Dirty Grandpa

Semi-Exclusive Zac Efron Strips Down On The Set Of Dirty

Ranking Zac Efron's Looks from Dirty Grandpa (2016)

Zac Efron tries to outdo Robert De Niro on set of Dirty Grandpa

Watch Zac Efron does the Macarena in a thong in 'Dirty Grandpa

So Zac Efron's Dirty Grandpa Jockstrap Is Up For Auction… Dare We

Zac Efron's underwear from Dirty Grandpa is for sale

Zac Efron flashes toned torso as he films Dirty Grandpa

Zac Efron Through the Years: Photos

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