The hand with different-colored painted nails in the beauty salon Michael C. Hall entered in the movie was the same as the "Ice Truck Killer's" trophy on Hall's Emmy-winning show Dexter (2006).
Taraji P Henson and Octavia Spencer will later appear together in Hidden Figures.
Troian Bellisario, who plays Film Set P.A., is the real-life daughter of Deborah Pratt, who plays Cassandra Williamson.