Les Liaisons dangereuses
Kathryn Merteuil is a fictional character who appears in "Cruel Intentions" and "Cruel Intentions 2", portrayed by actresses Sarah Michelle Gellar and Amy Adams, respectively. Based on the Marquise Isabelle de Merteuil in Pierre Choderlos de Laclos's 1782 novel "Les Liaisons dangereuses", Kathryn serves as the primary antagonist of the series.