Robin Williams became best friends with director StevenSpielberg after making this film. Reportedly, after Williams's death, Spielberg decided to watch this film out of rememberance, but couldn't finish it because he couldn't stop crying for hours.
The necklace worn by Lieutenant Dan is a rosary with a Saint Christopher medal, inscribed "Protect Us In Combat." It was worn in Vietnam by GarySinise's brother-in-law, Jack Treese, in 1967-68.
Christian Bale admitted he did not pack on as much muscle weight for this film as he did for Batman Begins (2005), in part due to keeping with the new Batsuit design, which is leaner and more flexible.
Jim Caviezel required heart surgery after the completion of The Passion, following the extreme stress in the making of this film and the several accidental injuries received. Rumor has it that director Mel Gibson paid for all bills from the procedure, as a sign of his gratitude and an apology for putting him through that.
Harrison Ford was offered and turned down the role of Dr. Alan Grant, as he felt that the part just wasn't right for him. After seeing the film, he says that he had made the right decision.
The part of Mason Verger was originally offered to Christopher Reeve based on his work as a wheelchair-bound police officer in Above Suspicion (1995). Not having read the novel, Reeve showed initial interest in the role, but ultimately declined upon realizing that Verger was a complete and total monster.
Leonardo DiCaprio called his one-on-one scene with Jack Nicholson "one of the most memorable moments of my life."
Before filming the interrogation scene. Heath Ledger told Christian Bale to hit him as hard as if Batman was really hitting the Joker.
According to Bill Paxton, he improvised much of his lines including "Game over, man! Game over!"
The exterior of Fischer's snow fortress is based on, and actually contains some elements of, the Geisel Library at the University of California, San Diego, designed by famed futurist architect William L. Pereira.
The notoriously famous shootout between Django and Calvin Candie's henchmen, was not written in the final script. Instead, he and Broomhilda are immediately captured after Dr. Schultz's demise.
Michael Keaton was unable to hear while wearing the Batsuit. He said that his claustrophobia helped get him in the proper mood to play Batman. "It made me go inward and that's how I wanted the character to be anyway, to be withdrawn," he said.
Amy Adams was Denis Villeneuve's first choice for Louise. She agreed to the role within 24 hours of receiving the script.
The original story was written at a dark time in Roald Dahl's life. He had already lost one of his five children to measles. It was only natural that he would be spurred on to write a tale portraying the father as a protector of the family.
Near the end of the movie, when Voldemort faces off with Dumbledore in duel, you can clearly see Dumbledore use The Elder Wand. The Elder Wand is the greatest wand ever made. The Elder Wand also is the vital element in the last instalment, Harry Potter and the Deathly Hallows: Part 2 (2011). The Elder Wand was also clearly visible in the Prisoner of Azkaban, too.
When casting for the role of Will Turner, it was down to Orlando Bloom or Heath Ledger. Gore Verbinski chose Bloom, because he heard he was in The Lord of the Rings trilogy, and felt he would be a more bankable choice.
Winona Ryder dropped out of The Godfather: Part III (1990) to appear in this film. Reportedly, it was Johnny Depp who actually convinced her to do so.
When Joel is in his head, and is visiting his session of the erasing process, no special effects were used to show the two Joels in the one scene. Jim Carrey had to take off his hat and jacket when he was not in the shot and had to quickly sit down in the chair, and visa-versa when he has to stand up.
For a cornfield scene, Christopher Nolan sought to grow five hundred acres of corn, which he learned was feasible from his producing of Man of Steel (2013). The corn was then sold, and actually made a profit.
Brad Pitt says he did not want his parents to see the movie, but he could not convince them not to watch it. They changed their minds after watching the chemical burn scene.
Judi Dench has more screen time in this film alone than Desmond Llewelyn had in his 17 films as Q, making her portrayal of M the most recurrent character in the series after Bond himself.
Carrie Fisher was also a well-known writer, whose services were often called upon to act as script doctor for other films. She later began declining such assignments when producers would solicit her story ideas, then hire someone else to actually change the script, using her ideas without paying her. However, Rian Johnson revealed that Fisher helped with the writing of the script for this film.
The T-rex occasionally malfunctioned, due to the rain. Producer Kathleen Kennedy recalls, "The T. rex went into the heebie-jeebies sometimes. Scared the crap out of us. We'd be, like, eating lunch, and all of a sudden a T-rex would come alive. At first we didn't know what was happening, and then we realized it was the rain. You'd hear people start screaming."
Despite having the dream team of George Lucas and Steven Spielberg behind the film, it was initially turned down by every studio in Hollywood. Only after much persuasion, did Paramount agree to do it.
As research for his character's occupation, Matt Damon worked with a Massachusetts State Police unit out of Boston. He accompanied them on routine patrols, participated in a drug raid, and was taught proper police procedures, like how to pat down a suspect.
Ridley Scott was determined from the outset to have Michael Fassbender play the part of David despite his agents asking too high a price as his fee.
JohnTravolta asked the writers if they were making fun of him with the "ridiculous chin" line. They explained that Castor was such an egomaniac that he would hate having anyone else's face.
Heath Ledger kept licking his lips, because the way he speaks during his performance, requires him to have a moist mouth. Many people said it was a habit of his own beforehand, (which it was), however, he ensured he did it "a lot more to keep his performance consistent".
Carrie Fisher traveled to the filming location of Finse, Norway, even though she was not scheduled to take part in any outdoor scenes.