Nicole Kidman and Colin Farrell began working together on The Beguiled (2017), only a few weeks after they wrapped filming on this film. Both films would go on to be in competition for the Palme d'Or at the 2017 Cannes Film Festival, and both would win awards in the official competition ("The Beguiled" won the Directing award for Sofia Coppola while "The Killing of a Sacred Deer" shared the Screenplay award with Lynne Ramsay's You Were Never Really Here (2017)).
Martin's favorite movie is Groundhog Day (1993) in there, the protagonist tried in vain, a lot of times, to save the life of an elderly man. Finally he accepted the fate of that man. In a similar way to the resignation about the family's fate of the protagonist in this movie.
The restaurant where they meet throughout the movie is the "Blue Jay restaurant". In American folklore the blue jay was considered a servant of the devil. In the meeting at school a cross is seen upside down on a piece of paper. The inverted cross is often used as a symbol of the devil.