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Dirty Grandpa is an upcoming American comedy film directed by Dan Mazer and written by John Philips. 

The film stars Zac Efron, Robert De Niro and Zoey Deutch. Filming began on January 5, 2015 in Atlanta.

Initial release: December 25, 2015 (USA)

Director: Dan Mazer

Genre: Comedy

1. Cast
   

   Zac Efron

   Jason Kelly

   

   Robert De Niro

   Dick Kelly

   

   Zoey Deutch

   Shadia

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