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.