To date, Cathy's Curse is the first and only film appearance of Randi Allen who portrayed the titular role. In a 2015 interview, Allen stated that she and her brother Bryce Allen, who also appeared in the film, only worked as child actors to financially support their single mother. Allen said she had no desire to continue acting and retired after her one and only film role.
Cathy's Curse was shot over the course of six weeks in the winter of 1976 in Montréal in the Canadian province of Québec.
The film marked the first English-language feature by French director Eddy Matalon.
The editing for this film was done in France.