Trivia: Vinnie Jones claimed he was offered a cameo role in this film reprising his role as Juggernaut from X-Men: The Last Stand, but turned it down as he did not like the process of having his costume put on.
Trivia: When Delores is reassembling herself, you can see she is missing the ring finger of her left hand. If you recall, Beetlejuice had this same finger adorned with a ring in his pocket when he attempted to marry Lydia in the first film.
Trivia: When Lacey Chabert turns on the TV for Jack, you see Lindsay Lohan onscreen. Lacey says, "Hmm, I went to school with a girl that looks like that." Lacey Chabert and Lindsay Lohan were in the Mean Girls movie together and were in school in that movie. (00:20:10)
Trivia: SPOILERS: Director Todd Phillips has defended the controversial ending, in which it is revealed that Arthur is not the Joker who would go on to fight Batman when he is stabbed and killed by another inmate, who then carves a smile onto his face. Phillips noted that the two films were called "Joker," and not "THE Joker," and stated that Arthur was the person who inspired the real Joker—presumably the inmate who killed him. However, this explanation was poorly received by fans, who felt duped.
Trivia: James Paxton, Bill Paxton's son, has a cameo as the angry hotel guest during the rodeo sequence.
Trivia: A fan created a poster of this film emulating the design of the musical's iconic poster. Upon seeing this image, Cynthia Erivo, who plays Elphaba, bizarrely called it the most offensive thing she had ever seen.
Trivia: When the Xenomorph lands over Kay, director Fede Alvarez asked for a bucket of cold water to be thrown at Isabela Merced to obtain a better scare face. Isabela says she was not informed earlier that they were going to throw cold water on her, so the face you see in that scene is her real face of fright trying to catch air because of how scared she was.
Trivia: The wallpaper in the hotel room, where the girls spend the night after the diner incident, matches the carpet in the hotel from The Shining.
Trivia: Lee Majors and Heather Thomas, who portrayed Colt Seavers and Jody Banks in the original television series, have cameos as the police officers who arrest Gail and Tom during the mid-credit scene.
Trivia: This film will actually have the shortest amount of time elapsed between installments, releasing around 2 years and 4 months after Ghostbusters: Afterlife. Ghostbusters 2 released 5 years after the original film, the 2016 film released 27 years after Ghostbusters 2, and Ghostbusters: Afterlife released 5 years after the 2016 film.
Trivia: Writer/Director Parker Finn has a cameo as the photographer during Skye's photo shoot.
Trivia: This film's budget reportedly ballooned due to Dwayne Johnson frequently showing up late to set.
Trivia: Near the beginning of the movie, as the SWAT vehicles are approaching, a billboard is visible in the background advertising the movie "The Watchers", which was directed by M. Night Shyamalan's daughter, Ishana.
Trivia: Michael Bay, director of the first two films in the franchise, has a cameo as a pissed off driver who almost runs over Mike. He's driving a black 964 Porsche 911 Turbo, which is the same car Mike drove in the first film.
Trivia: Prior to appearing in this film, Giancarlo Esposito expressed interest in playing either Professor Xavier or Magneto in the MCU's eventual iteration of X-Men.