Filmmaker Guillermo Del Toro is gearing up for another epic monsters versus robots battle with a Pacific Rim sequel.

The director's futuristic sci-fi movie was much-maligned in North America, where it has grossed just under $102 million (£68 million) to date since its July (13) release, but it became a big hit across the rest of the world, taking its current global gross to $407.6 million (£271.7 million) on a budget of $190 million (£126.7 million).

Now Del Toro has revealed he's started work on a follow up with screenwriter Travis Beacham, although he has no idea if studio bosses at Warner Bros. will approve the project.

He tells, "We are writing the sequel. Travis Beacham and I are writing, so that is active. The decision to green light or not, that's definitely above my pay rate."

Pacific Rim starred Charlie Hunnam, Idris Elba and Rinko Kikuchi as they tried to save mankind from an invasion of giant monsters by suiting up as oversized robots to do battle.