The Simpsons is heading back to the big screen - creator Matt Groening has confirmed a sequel to last year's hit movie.

The animated comedy went feature-length for the first time, and became a box office smash with earnings of more than $500 million worldwide. So Groening is returning to Springfield for a follow-up - but he warns fans they have a long wait ahead, as the first film took four years to make.

He says, "It will happen at some point, but I have no idea when. The first one took us four years - mainly because we don't like to work any harder than we usually do."

Last year marked the 20th anniversary of the Emmy Award-winning animated franchise.

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(This news article provided by World Entertainment News Network)