In the first scene of the movie, as Cap'n Hogie is in flight and calling over the radio, he uses the call sign 'Foxtrot Uniform Charlie Kilo'...a cryptic slang way to use profanity.
The dolls were portrayed via motion capture by their respective actors and actresses.
In the hobby store, when Mark checks out the miniature medals, the Purple Heart he buys has a reference label next to it reading CRM-114. CRM-114 is a piece of radio equipment in Stanley Kubrick's "Doctor Strangelove". The code has then been used by Kubrick in latter films and by other filmmakers as a tribute to him.
With a budget of $40 million, it debuted with $2.4 million in its opening weekend, making it one of the biggest box office failures of 2018.
The human counterpart for Suzette is revealed to be a pornographic actress that Mark admires. Leslie Zemeckis, who plays Suzette, got her start appearing in softcore Skinemax films.
Deja Thoris, one of the characters in the movie, shares her name with a main character from Edgar Rice Burroughs series of books about John Carter, Warlord of Mars.
The real-life doll village is actually named Marwencol, a combination of Mark, Wendy, and Colleen. The real Colleen became the character Nicol, so the "col" was dropped from the name.
The seventh Universal's live-action/animated hybrid film, after Casper (1995), The Adventures of Rocky & Bullwinkle (2000), Paul (2011), Hop (2011), Ted (2012) and Ted 2 (2015).