Dermot Mulroney is in talks to star alongside Zac Efron and Robert De Niro in upcoming comedy 'Dirty Grandpa.'
According to the Hollywood Reporter, the QED and Lionsgate project, which was penned by John Phillips, would be helmed by 'The Dictator' writer Dan Mazer, while Barry Josephson produces.
The movie portrays Efron as a young man who is tricked into driving his grandfather (De Niro), who's a perverted former Army general who thinks his grandson is about to marry the wrong woman, to Florida for spring break.
Mulroney will play Efron's father and De Niro's son in the film, which will begin filming later in January.
