Zac Efron and Robert De Niro have gone coastal.

Their movie "Dirty Grandpa" first filmed in metro Atlanta earlier this year before heading eastbound and down. They've been filming at Tybee Island.

The movie is about a guy (Zac) who takes his lewd gramps (Bob) on a spring break trip to Florida (Tybee).

Apparently the plot involves time travel back to about 1988. Check out these neon britches and Flashdancey crop top!

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Prosecutor Skandalakis has previously suggested that pursuing criminal charges against President Donald Trump may not be feasible until after he leaves office in 2029. (Craig Hudson/Politico/Bloomberg via Getty Images)

Credit: Bloomberg via Getty Images