The first film made in Dolby Digital.
Michelle Pfeiffer got through 60 catsuits during the 6 month shoot, at a cost of $1,000 a time.
Susan Sarandon showed great interest in the role of Catwoman, but eventually opted to take a leading role in Lorenzo's Oil (1992), a role that was vacated by Michelle Pfeifer.
Security was so tight on the production that even Kevin Costner was refused permission to visit the set. Warner Brothers employed a private investigator firm when some shots of Danny DeVito in costume made it into the tabloids.
In the US, McDonald's were forced to cancel a Happy Meals promotion with the film, after parents protested about its violent and sexual nature being inappropriate for young children.