Annette Bening was cast as Catwoman, but was replaced by Michelle Pfeiffer when she became pregnant.
It made $47.7 million in its first 3 days, a record at the time.
The catsuit was so tight on Michelle Pfeiffer that she often had trouble hearing her own voice.
The character of Max Shreck was a re-write of District Attorney Harvey Dent; accordingly, most of his plot points would have perhaps made more sense if Shreck were D.A. instead of a corrupt businessman. The explosion at the end of the film was a means to injure Dent and produce the scars that would lead to his transformation into Two-Face for the third movie in the series.
Geena Davis and Brooke Shields were each offered the role of Catwoman, but both of them turned it down. Lena Olin and Madonna were considered for the role and Susan Sarandon was interested.
Danny DeVito remained in character between takes.
Dustin Hoffman was Warner Brothers’ first consideration for “The Penguin.”
When Michelle Pfeiffer moved house in 2004, she found the whip she had used during filming. Feeling reminiscent, the actress went out to her yard and attempted some whip play, but according to her she was “a bit rusty.”