Trivia: Director Jason Reitman is the son of Ivan Reitman, director of the original "Ghostbusters" and "Ghostbusters II." As a child, Jason actually had a cameo in "Ghostbusters II" during the birthday party in the beginning. (He's the kid who tells Ray he heard the Ghostbusters were "full of crap").
Trivia: The family of late author Roald Dahl who wrote the novel The Witches gave director Robert Zemeckis permission to do a remake on the condition that the ending of the movie follow the ending of the book, where the boy remains a mouse.
Trivia: Panning around Diana's apartment, the camera briefly lingers on a photo of her with an elderly lady, with no elaboration of its significance. But look closely and you'll realise the woman in the photo is Etta from the first movie, again played by Lucy Davis, just made up to look 67 years older.
Trivia: When Barley and Ian are paying their toll at the "troll bridge", look on the right hand side and you can see the Pizza Planet Truck.
Trivia: Dylan's mom's story about the Florida man who was in bed when a sinkhole opened up under him actually happened to Jeffrey Bush on 2/28/13 in Seffner, Fl (Tampa suburb). He (along with his bedroom furniture) was entombed. Brother Jeremy heard him scream, jumped in with a shovel and tried to dig him out, but Jeffrey's body was never recovered. The house was razed and the sinkhole filled in but it re-opened 2+ years later on 8/20/15. Sinkholes are common in FL and 6 states - AL, KY, MS, PA, TN, TX. (01:26:35)
Trivia: The scientist Sarah has the video call with is a real theoretical physicist called Clifford Johnson, who's served as a consultant for films and TV shows including Agent Carter, Thor: Ragnarok, Avengers: Infinity War, and Avengers: Endgame.
Trivia: Despite the video-game series being quite bloody and gory, this is actually the first "Mortal Kombat" movie to receive an R-rating.
Trivia: This is the first Pixar movie that does not feature the voice of John Ratzenberger. Instead there is a cameo of an animated version of him.
Trivia: Stay tuned for an extra scene after the credits.