Nicola Coster married actress, Candance Hilligoss with whom he had two children. The marriage ended in 1981.
After college, Hilligoss attended the Barbizon Modeling and Acting School in New York. Following her graduation from there in 1956, she was one of five models who travelled to South America on a month-long tour to demonstrate the new-American fashions.
Candance gained fame for her role as Mary Henry in the independent horror film, Carnival of Souls. She also appeared in a supporting role in the horror film, The Curse of the Living Corpse, while Hilligoss was living in New York. In 1997, she asked to appear in the remake of Carnival of Souls but declined.
In 2022, Hilligoss voiced an animated version of herself as she appeared circa 1962 in the CG animated short film, Once Upon A Time on Mars.