Kathryn Merteuil is a fictional character from the 1998 film Cruel Intentions, portrayed by actress Sarah Michelle Gellar. She is the wealthy and manipulative daughter of Basil Merteuil, who is known for her cunning and strategic thinking. Kathryn plays a central role in the film's plot, which revolves around themes of seduction and betrayal among privileged teenagers in New York City.
In the story, Kathryn seeks to maintain her social status and control over her peers, often using deceitful tactics to achieve her goals. Her character is emblematic of the darker aspects of high society, showcasing the lengths to which individuals will go to protect their reputation and power.