Johnny Depp, Keira Knightley, Geoffrey Rush in a still from Pirates of the Caribbean: At World's End (2007).?[Disney Pictures]

Now that the final chapter of Pirates adventure trilogy, Pirates of the Caribbean: At World's End, is ready to hit the theaters around the world, rumor has it that there will be a fourth Pirates of the Caribbean movie.

But producer Jerry Bruckheimer has hinted that if at all there is a fourth pirates movie, it will be a spin-off.

Bruckheimer, in an interview with The Herald Sun, said that the Pirates of the Caribbean series end with the third movie.

"This is the end [of the current trilogy], but whether one of the characters or a couple of the characters continue on, it's a possibility. Certainly, in a moment at the end of the film there is a hope that something else might happen," Moviehole quoted Bruckheimer, as telling the paper.

Geoffrey Rush seconded Bruckheimer's claim, saying that a fourth film is possible, but it just might not star Johnny Depp as the famous Captain Jack Sparrow.

"Inevitably they may think about it, but Johnny may say, ‘Pah, I've burnt out Jack. I couldn't go there again'. Or he may not. I certainly know he wouldn't say 'Hey, treble my fee and I'll do it," Rush said.