When the novel "Les Liaisons dangereuses" by Choderlos de Laclos was first published in 1782, it was considered so scandalous, that when Queen Marie Antoinette commissioned a copy for her personal library, she had to have it bound in a blank cover, so that no-one would recognize the author's name or title.
Alan Rickman made the role of Valmont famous in London and on Broadway. However, filmmakers wanted to cast an established actor in the role, so Rickman wasn't even considered. Rickman ended up making his Hollywood debut as Hans Gruber in Die Hard (1988) instead.
Director Stephen Frears and Screenwriter Christopher Hampton were so taken upon meeting Mildred Natwick, they hadn't realized that they'd forgotten to offer her the part of Valmont's aunt, until after they'd parted company.
John Malkovich, who played the Vicomte de Valmont, directed a 2012 French-language production of the Christopher Hampton play for the Parisian company Théâtre de l'Atelier. When it later toured the U.S., it was presented in French, with English supertitles (even thought Hampton wrote his play in English).
Due to budget constraints, some of the costumes were made using sari fabric and (technically anachronistic) prints by Scalamandre. Lace trims dating from the Victorian and Edwardian eras were also used.
Not only do Michelle Pfeiffer (Madame de Tourvel) and Uma Thurman (Cécile de Volanges) share the same birthday - April 29th - but the two would go on to play Batman villains. Pfeiffer played Catwoman in Batman Returns (1992), and Thurman played Poison Ivy in Batman & Robin (1997).
The original Broadway production of "Les Liaisons Dangereuses" by Christopher Hampton opened at the Music Box Theater in New York City on August 30, 1987, ran for 149 performances and was nominated for the 1987 Tony Award (New York City) for the Best Play.
The trivia items below may give away important plot points.
Glenn Close came up with her character's final scene. When Frears gave her the line in the text about the character: "her soul was on her face," Close thought for a minute and stated: "I know how to show that."