Milady de Winter, often referred to as simply Milady, is a fictional character in the novel The Three Musketeers (1844) by Alexandre Dumas, père, set in 1625 France. She is a spy for Cardinal Richelieu and is one of the dominant antagonists of the story. Her role in the first part is to seduce the English minister, the Duke of Buckingham, who is also the secret lover of Queen Anne of France.