Milady de Winter, often referred to as simply Milady, is a fictional character in the novel The Three Musketeers (1844) She is a spy for Cardinal Richelieu and is one of the dominant antagonists of the story. Her role in the first part of the book is to seduce the English prime minister, the duke of Buckingham, who is also the secret lover of Queen Anne of France. She later is revealed to be the wife of Athos, originally the Comte de la Fère.