The original was released in 2000, with the sequel Meet The Fockers hitting screens four years later.
The movies, starring Stiller and Robert De Niro, grossed more than $846 million (Dh3.1 billion) worldwide and the third installment, Little Fockers, is set to hit screens later this month
Hollywood.com reports, Stiller has now revealed he's penned a fourth script and hopes to convince funnyman Will Ferrell to appear in the next comedy.
"Will [Ferrell]? Hopefully. We finished the script and hopefully we'll shoot it next year," he said.
