Washington, September 6 : Zac Efron and Robert De Niro are reportedly in talks to star in a "road trip comedy" together called ' Dirty Grandpa'.

According to the Hollywood Reporter, they are in the early stages of negotiations for role in the film, which will be directed by Dan Mazer .

Sources revealed that De Niro will play a "perverted former Army general" who tricks his grandson, which will be played by Efron, to drive with him to Florida for spring break, as he thinks that he is marrying the wrong girl. (ANI)