Jeff Daniels (Roger) says that on more than one occasion, he heard an authoritative voice on the dog-strewn set shout "Sit!" and immediately plopped himself into a chair only to be told, "Not you, Jeff."
Glenn Close initially rejected the role of Cruella due to scheduling conflicts with the stage musical "Sunset Blvd." The producers then offered the role to Sigourney Weaver who also declined. By that time, Close had ended her run on Broadway, and when the producers offered her the role again, she accepted.
Writer John Hughes made more money from this movie than any other movie in his career, because his contract gave him a piece of the merchandising profits.