It was hilarious. Zac Efron and Robert De Niro were spectacular together.

I love dirty grandpa, it was the funniest movie I've seen in a long time !!!!!

This was one of the funniest movies we have seen in years. De Niro is probably one of the best One line delivers in the business. Funny Funny Funny!!!

It was very funny and had its emotional moments. Overall i loved it.