Lesley-Anne Down married assistant director Enrique Gabriel during filming. It was his first and only, and her first of three marriages. They divorced about one year later without offspring.
Four actors (John Rhys-Davies, Vic Tablian, Tutte Lemkow and William Hootkins) who appear in Sphinx (1981)--also appear in the similarly archaeological themed and Egyptcentric Raiders of the Lost Ark (1981)--released the same year.
Sphinx (1981) was based on Robin Cook's second novel "Tombs" for which the film rights were purchased for $1 million.