Zac Efron, Robert De Niro in talks to star in 'Dirty Grandpa'

Washington: Zac Efron and Robert De Niro are in talks to star together in road trip comedy ' Dirty Grandpa ' that will be directed by Dan Mazer.

Reportedly, Efron will play a young man who is tricked into driving his grandfather portrayed by De Niro to Florida for spring break.

De Niro will be play a perverted former Army general who thinks his grandson is about to marry the wrong woman.

The movie will be produced by Barry Josephson.