Dirty Grandpa is a comedy film directed by Dan Mazer and written by John Philips. The film stars Robert De Niro, Zac Efron, Zoey Deutch and Aubrey Plaza. After Jason's grandmother dies and just before his marriage, his grandfather asks him to go on a road trip to Daytona Beach, Fla., and there's where Jason learns a couple of lessons from his "dirty grandpa". I found this movie really funny most of the time and I couldn't stop laughing at a lot of the jokes. I suppose that a lot of these negative reviews for this movie are from people who think that this movie is against their "morals". But it doesn't really matter, cause Dirty Grandpa has been a box office success and a lot of people liked it, including me. Zac Efron is really funny, he has shown that he's got comedic guts over and over again. I am becoming a fan of as I keep on seeing him in these kind of movies . Robert De Niro is also awesome on the role all throughout. I also really liked the supporting characters, especially Jason Mantzoukas as a drug dealer who had me laughing every time he was on screen. Sure this movie isn't nowhere near a comedic masterpiece and nor is it trying to be. It is a fun ride from beginning to end, and despite all the clichés, the jokes are what make this ride worth it.