Mia Farrow was slated to play Charlotte Randall. Mike Nichols had to fight to let Farrow have the part, due to the film company's hesitancy over her being too controversial at the time (the then current Mia Farrow/Woody Allen trial). She had to take a salary cut but in the long run she had to bow out anyway due to schedule conflicts.
In Christopher Plummer's new memoir, he revealed that while filming a scene, he got so into character that he actually slapped Michelle Pfeiffer across the face instead of faking it.
When Will meets with Alden and his lawyer, in the bookshelves you can see six Robert Jordan books: One copy of 'The Eye of the World', one copy of 'The Great Hunt', two copies of 'The Dragon Reborn', and two copies of 'The Shadow Rising'.
John Williams was originally attached to compose the music for this film. Soon left the project after the film was delayed and needed some time off after winning the Oscar for Schindler's List, as he'd been working on Jurassic Park, Schindler's List and overseeing the Boston Pops Orchestra in Boston.
Director Mike Nichols had originally wanted lead actress Michelle Pfeiffer to wear a red-hooded sweatshirt for the film's final act. She refused as she thought it would harm the film's credibility.
Despite their on-screen relationship, Michelle Pfeiffer and James Spader became friends during the making of this film and were still friends when Pfeiffer's husband, TV producer David E. Kelley, was looking for the male lead for his series Boston Legal.