The veteran actor reprises his role as grumpy father-in-law Jack Byrnes in `The Little Fockers` and said he loved the chance to return to the movie series for the third time because it is so much fun.
He said: "We have fun. I enjoy it a lot. When you`re doing comedy I have less restrictions or constrictions. You can cut something out or the director will say to try something else, you can be broad, there`s more room for just having fun."
De Niro was also delighted his old friend Harvey Keitel was cast in the film as a contractor hired by his character`s hapless son-in-law.
He added: "It seemed like a good thing for Harvey to be in it, everyone was okay with it. When you have different people with different working styles sometimes you have to get around that stuff and Harvey is one of my oldest, dearest friends. We had to get all that working, but it was good. It was terrific."
Meanwhile, Ben Stiller has revealed he has written a fourth `Meet the Parents` film, which he plans to begin filming in 2011 with Will Ferrell.
He said: "Will? Hopefully. We finished the script and hopefully we`ll shoot it next year."