Adam Pally joins cast of road trip flick 'Dirty Grandpa'

Washington: Adam Pally is the latest addition to the cast of Lionsgate's upcoming comedy ' Dirty Grandpa.'

The film, which would be helmed by Dan Mazer from a screenplay by John Phillips, would focus on an uptight twenty-something man, played by Zac Efron, who goes on a road trip with his foul-mouthed, sex-obsessed grandfather ( Robert De Niro ), Deadline.com reported.

The 32-year-old 'Happy Endings' star would play Efron's crass and crude cousin in the film, which also stars Aubrey Plaza, Zoey Deutch and Dermot Mulroney, and is currently filming in Atlanta.

Barry Josephson, Bill Block, Michael Simkin and Jason Barrett would producers, while Anton Lessine, Sasha Shapiro and John Friedberg act as executive producers.

The movie has been set for an August 2016 release.