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Keira Knightley has ruled out a return to the franchise after her former co-star Orlando Bloom suggested he would be open to returning. Knightley has stated that to be part of the franchise was an amazing time in her life, but as it took five years of her life, she just can't see herself going back. However, after fans heard of Bloom's return, they demanded the producers to bring Knightley back as well, resulting in her scenes being filmed at the last minute.
The father of Captain Jack Sparrow was played by a Rolling Stone (Keith Richards), and in this movie, the uncle of Captain Jack Sparrow was played by a Beatle (Sir Paul McCartney).
This movie was being produced as Johnny Depp was going through a bitter divorce. He was chronically late to the set, to the point where it ate into the schedule as the set often came to a halt for several hours at a time. It got to the point where a production assistant was hired just to wait outside Depp's house and announce that he was awake when they saw the lights inside come on.
Although this movie was initially claimed to be the last one in the franchise, a sixth installment was announced after its release.
Because Will Turner (Orlando Bloom) is the Captain of the Flying Dutchman, he can only set foot on land once every ten years. This movie was released ten years after the third movie, which was the last one with Will.
(At around six minutes) Henry (Lewis McGowan) recognizes a ship as Bonnet's ship called "Royal James". Stede Bonnet was a real-life pirate who worked closely with Edward Teach, a.k.a. Blackbeard. Bonnet was active from December 1717 to December 1718 before he was hanged in Charles Town for piracy.