Czech actor Florence Marly was a personal friend of Harrington. He later said that he had to fight with Roger Corman in order to hire her "because she was an older woman. I'm sure he had some bimbo in mind, you know? So I fought for Marley because I felt she had the required exotic quality that would work in the role". Harrington also said Dennis Hopper "was like a part of my little team by then", so he also agreed to appear.