Trivia: The bit where Will impersonates Jack was devised by Orlando Bloom (Will), who asked the producer if he could put it in the movie.
Trivia: In the sword fight scene between Jack and Will, the tattoo Orlando Bloom (Will) got while filming The Lord of the Rings trilogy can be seen on his right forearm when they stop for a moment and his arm is in the air, blocking Jack's sword with his own.
Trivia: When Will Turner gives Governor Swann the Commodore's sword, the sword-flipping done by Will took fifteen takes, because Orlando Bloom (who played Will) kept dropping the sword. On DVD 1, Director's commentary.
Trivia: Jack's pistol is the only authentic 18th century pistol in the movie. Director Gore Verbinski requested it especially because of the importance of the prop. The rest are made by a propmaster.
Trivia: One of Barbossa's pirates has a beard with dreadlocks that's always on fire in the film. There is wire with copper sockets in the ends of the dreads, where they would insert incense and burn it for the smoking effect. After every take they would have to reinsert incense and relight his beard. During the sword play, the locks in his beard would flop around, causing it to possibly burn himself or someone else, or even light up the rest of his beard.
Trivia: Elizabeth falling off the fort was filmed on a set, south of Los Angeles. Jack diving off the ship to rescue her was filmed in the Caribbean, and his actually rescuing Elizabeth was filmed in a tank in Long Beach, California. There are thousands of miles between those three consecutive shots. This is similar circumstances to the scene when Elizabeth is walking the plank and surfacing. Both were shot in the Caribbean, but with a few days in-between shots. On the commentary, Jack Davenport (Norrington) mentions Keira Knightley's (Elizabeth) little-known ability to hold her breath for two days.
Trivia: As the Interceptor is pulling away from the Dauntless, in the wide shot there are still ropes between the two ships. The camera crew were caught off guard, since the sails were full, the Interceptor started pulling away sooner than expected, pulling the ropes taut, ripping off the belaying pins. Johnny Depp (Jack) was hit hard in the knee with one of those pins and knocked him to the ground. It was the only shot the camera crew had of Interceptor actually pulling away. On screen, in the close-up, Will is seen cutting all the lines. Commentary, DVD.
Trivia: On the day when Keira Knightley had to kiss Orlando Bloom during filming lots of the members of the cast brought their teenage daughters to the set. As Keira and Orlando were kissing all the girls were giving her evil glares so in a Behind the Scenes special, Keira apologized to all the girls who are obsessed with Orlando.
Trivia: In one of the deleted scenes on the DVD where Jack and the pirates are improvising about the French ("They invented mayonnaise"), his last line in the clip is "I'll get me coat." This is a reference to "The Fast Show," which featured a guest appearance by Johnny Depp (Jack) in its final show.
Trivia: After we see the Disney ride scene at the jail, where the pirates are trying to get the dog to come near them with a bone, Jack Sparrow says to the pirates "You can keep doing that forever, that dog is never going to move." Besides the obvious visual reference to the ride, the line's relevant too - as in the Disney ride, the pirates *will* keep doing that forever, and the dog *is* never going to move.
Trivia: Johnny Depp wears contacts in the movie. But they are not for changing his eye colour or anything, they are actually darkly tinted to act like sunglasses so Depp wouldn't have to squint when they were filming in the sun.
Trivia: As revealed during several interviews with Johnny Depp and his costars, he based his portrayal of his character on Rolling Stones guitarist Keith Richards who Depp has suggested should appear in the sequel, playing Jack's father.
Trivia: Johnny Depp actually had his teeth capped for the film, and kept the caps on for several months after the filming was completed in case he was called back for reshoots.