Trivia: After Rodmilla and her daughters leave for the masque, during the next scene at the royal palace a large sculpture can be seen in the courtyard, especially in some closeups from different angles, such as when Gustave approaches Leonardo. This mythologically themed sculpture consists of a tailed figure riding upon one of two creatures holding their reins, with a ship behind them. This sculpture can be seen during the very first scene, albeit with a few changes. When Wilhelm and Jacob Grimm walk into the Grande Dame's chamber she is sitting up in an unusual type of bed. Note the bed's "headboard" and "footboard" are the ship hull (in the fullscreen version the bed's side is visible with its distinctive design), and we also see the creatures (minus their horns) with the rider's arm holding their reins at the foot of the bed. Something else to notice near the end, when Leonardo gifts the young couple the belated wedding present the room they're all in is not in the royal palace, they are in the manor, gathered in the dining room where Marguerite had burned Danielle's book Utopia.
Trivia: Adrian Brody insisted on learning to play the piano himself because he detested the idea of him being in a long shot pretending to play the instrument and then the camera showing someone else's hands on a close up shot actually playing. He said he hated that, not just for him, but on any other film that had such a scene. So he went and took lessons, practicing for hours on end.
Trivia: Victoria Tennant hated the scene where her character was to be killed off so much that she refused to film it and walked off the set. The scene then had to be done by a stunt double.
Trivia: Most of the secondary cast and extras were people who actually fled Europe to America during Nazi rule. When Laszlo orders the band to play "La Marseillaise," it was very emotional for the cast who sang along and their reactions were very much their true feelings at the time.
Trivia: When David Banner is dreaming about his trial, the jury foreperson is played by The Incredible Hulk creator, Stan Lee.
Trivia: Disney wanted people to despise Scar, the film's villain, so, during Scar's big song 'Be prepared', they made references to Adolf Hitler. When Scar's army begins to march, they are goose-stepping like Nazi soldiers and have their snouts raised like a Nazi salute (their snouts appear longer here than in any other part of the movie, and pointed to their right). Scar is on a large ledge, which resembles a balcony, much like that used by Hitler - on the side, the rock has a pattern resembling a giant Swastika. And finally, on the ground where the army marches, lines appear. These lines were on the streets of Germany, where the Nazis paraded.
Trivia: The actress playing Connie has the same surname as her character - Moreau.
Trivia: Though not revealed in the movie, the Prince's name is Adam. At the New Orleans Disneyworld, the Princess hotel rooms have portraits of each Disney prince. The 'Beauty & the Beast' prince is shown in human form and his name stated underneath as 'Prince Adam.' In addition, the officially licensed Disney Fisherprice 'Little People' sets include 'Belle and Prince Adam.'
Trivia: The wolf in the film was played by two different wolves. Neither knew how to howl, so a third wolf had to be brought in for the howling scene.
Trivia: Throughout the entire movie, no one ever says the bass player's name. Even in the credits, he is listed as T.B. Player and The Bass Player.
Trivia: Julian was played by twins Cole and Dylan. You can tell which twin is in a scene as Cole has a mole on his left cheek which is paticularly visible in close up.
Trivia: The Sator Square dates back to Pompeii and is a square of 5 Latin words making a palindrome: Sator, Arepo, Tenet, Opera, and Rotas. Whichever orientation the square is in the words line up in both directions. Each word features in the film - Kenneth Branagh's character is named Sator, the forger mentioned near the start is Arepo, the title is of course Tenet, the opening sequence takes place in an Opera, and the Ukranian special forces who arrive in that sequence have badges on their arms with "Rotas" on them.
Trivia: George reads a paperback while reclining on his prison bunk. The book is "Hells Angels" by Hunter S. Thompson, the author whom Depp previously portrayed in the movie Fear and Loathing in Las Vegas (1998).
Trivia: If you listen very carefully to the part where Al MIchaels says, "Do you believe in miracles? YES...", you'll notice that it's from the original broadcast of the game in 1980. All other play-by-play was re-done by Michaels as the movie was produced. The reason they used the original 1980 broadcast for just that specific moment is that Michaels had a difficult time recreating the emotion and excitement he felt when shouting it as it really happened.