The script was written after Sam Raimi and Ivan Raimi completed Army of Darkness (1992), but Sam pursued other projects before returning to this.
The yellow Oldsmobile Delta 88 is Sam Raimi's own car that his father first bought new in 1973. It has appeared in all of his films except The Quick and the Dead (1995), For Love of the Game (1999), and Oz the Great and Powerful (2013).
A "lamia" is actually a bogey-woman from Greek mythology who stalks the countryside looking for children to devour; it was a story used to get young children into their beds at bedtime.
When Sylvia Ganush attacks Christine in her car, Sylvia curses in Hungarian, "Az ördög szálljon beléd!" ("Shall the devil fly into you!") She also uses the Hungarian word "szajha" two times (the word means "bitch" or "whore" in English).
Ted Raimi: Sam's brother makes an off-screen cameo as a doctor. Their brother Ivan (also the co-screenwriter of this and several other Sam Raimi-directed films) really is a practicing doctor of osteopathic medicine.
Christopher Young: The composer of the musical score can be briefly seen eating a cupcake outside the bakery Christine looks into on her way to her work at the beginning of the film.
Sam Raimi: [Oldsmobile] Raimi's 1973 Oldsmobile Delta 88, also known as the Classic, appears in the movie as Sylvia Ganush's car.