Nancy Sinatra was the original choice to play Sugar Kane. However, she backed out just before production was supposed to begin because a few months earlier her brother Frank Sinatra Jr. was kidnapped and when she found out that part of the plot involved a kidnapping she decided to back out. Interestingly, it would have been her motion picture debut.
Lorelei's tail was made of fiberglass and latex. During Lorelei's close-ups, Marta Kristen would wear a costume belt to allow her to use her legs for swimming whenever her character is only seen waist up.