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Zac Efron and Robert De Niro go on spring break in the first trailer for their upcoming comedy “Dirty Grandpa.”

Immediately following his wife’s funeral, De Niro’s Dick Kelly convinces his grandson Jason, played by Efron, to go on a road trip to Florida, eventually landing at Daytona Beach during spring break.

“The greatest gift a grandson can give his grandfather is a hot college girl who wants to have unprotected sex with him before he dies,” De Niro tells Efron.

“Most grandpa’s just want toffee. Or socks,” Efron responds.

One week away from marrying his boss’s daughter, the trip (and some accidental crack-smoking) puts his pending nuptials in jeopardy.

Directed by Dan Mazer, “Dirty Grandpa” also stars Aubrey Plaza, Julianne Hough, Jason Mantzoukas, Dermot Mulroney and Zoey Deutch.

“Dirty Grandpa” hits theaters on Jan. 22.