Los Angeles: 'My Best Friend's Wedding' actor Dermot Mulroney is in talk to join Zac Efron and Robert De Niro in an upcoming comedy 'Dirty Grandpa'.
Dan Mazer, who has worked with Sacha Baron Cohen on Borat, Bruno and 'The Dictator' as a writer, is directing the film. Barry Josephson is producing, said The Hollywood Reporter.
Efron will play a young man who is tricked into driving his grandfather (De Niro), a perverted former Army general who thinks his grandson is about to marry the wrong woman, to Florida for spring break.
Mulroney, 51, will play Efron's father.