- Acting for Two: Naturally Rachel Weisz and Patricia Velasquez both play their current characters, as well as their past lives.
- Actor-Inspired Element:
- John Hannah came up with the idea to fill the bathtub with bubbles. He slipped getting out and injured his knee.
- Shaun Parkes suggested Izzy having four silver teeth (the director just wanted one).
- Advertised Extra: Dwayne Johnson is on the poster but only appears in the prologue, and the film's ending sequence (sorta).
- Celebrity Voice Actor: The Japanese version had another famous professional wrestler, Nobuhiko Takada, voicing Mathayus.
- Christmas Rushed: The digital effects of the Scorpion King had to be rushed, and were completed only eight days before the film's release.
- Cowboy Be Bop At His Computer: When the film was aired on TV, the plot was mistakenly described as being about "resurrecting Isis", and Alex was said to be eleven years old.
- Creator In-Joke: Izzy mentions a "bank job in Marrakesh". The prison and Cairo scenes in the first film were shot in Marrakesh.
- Dyeing for Your Art: As Imhotep appears in more scenes regenerated (and has more Shirtless Scenes), Arnold Vosloo had his entire body shaved twice a day.
- Fake Nationality: The Scorpion King is Dwayne Johnson, an American of sub-Saharan African and Polynesian descent, playing an ancient warrior from the area of modern day northern Iraq.
- Hey, It's That Place!: You may have seen the O'Connells' house in the original The Omen. More recently, it was used as Wayne Manor in Batman Begins.
- Never Work with Children or Animals: Well partly. Steven Somers gave the film an eight year Time Skip from the first because he "didn't want to work with babies".
- No Stunt Double: Rachel Weisz and Patricia Velasquez trained for five months for their fight scene. They did the fight without any stunt women.
- The Other Darrin: Of the music variety - Alan Silvestri did the score for Returns, taking over for Jerry Goldsmith.
- Playing Gertrude: The film was only released two years after the first one, but Rachel Weisz and Brendan Fraser play characters who are at least eight years older.
- Promoted Fanboy: Freddie Boath passed on a role in Harry Potter to do this film, because the first one was one of his favourites. He even helped consult a lot of the cast and crew on details from the first.
- Star-Making Role: This made Dwayne Johnson a movie star and led to him transitioning to films from wrestling permanently.
- Tribute to Fido: Izzy is named after Stephen Somers's dog.
- What Could Have Been:
- According to the video game tie-in, the Scorpion King was supposed to conquer Sumer 6,000 years before the events of the film. They changed it to Thebes 5,000 years earlier to make it more understandable.
- Notice how four mummy guards chase out of the museum, but only three are killed? The fourth was meant to pop up and attack Alex once the bus had stopped. But the director felt the audience would have had enough of the scene, and cut the last part.
- The O'Connells were going to live in an apartment, but it thought that a Big Fancy House would look better for a fight scene. The fight scene itself was going to take place in a casino owned by Jonathan. But as the budget wouldn't allow for building another set, they just had it in the house instead.
- Evey's past life was going to be called Nefertiti. But the director realised the Narm in the name and changed it to Nefertiri.
- A small detail cut from the film but remaining in the novelization; the Scorpion King has his followers scalp themselves as a sign of fealty, and did so himself. A single remnant of this can be seen in the final product, when Imhotep slaps his head while declaring loyalty to the Scorpion King — in the novels, he rips his own flesh off to prove his loyalty. This is also how the curator would survive in the jungle, he would scalp himself so the monsters would leave him along thinking he is a servant of the Scorpion King. Presumably this was cut for being too gruesome, especially if it was going to be shown multiple times.
- Word of God: The Scorpion King was a look-alike descendant of the one from the Scorpion King film.
Trivia / The Mummy Returns