Diana Mary Villiers Negroponte (born 1947) is an English-born American trade lawyer and adjunct professor of law at Fordham University whose professional name is Diana Villiers Negroponte. She is the wife of John Negroponte, the former United States Deputy Secretary of State and former U.S. Director of National Intelligence.
A descendant of Charles II's mistress Barbara Villiers, Duchess of Cleveland, and George Villiers, 4th Earl of Clarendon, who served as Queen Victoria's three-time Foreign Secretary, she was born in London. Her father was Sir Charles Villiers, a merchant banker who was the chairman of British Steel Corporation from 1974 until 1988; her mother was Sir Charles's second wife, the former Countess Marie Josée de la Barre d’Erquelinnes.
While visiting her uncle, British Ambassador Sir Peter Wilkinson, in Vietnam in 1968, Diana Villiers met John Negroponte at a dinner given in her honor and he "explained the constitutional assembly throughout the whole meal!" she said. "I was terrified -- and bored. Terrified that he might ask me something I didn't know the answer to, and bored because I was just a 21-year-old." She recalled, "The next day he's on the same Pan Am flight I am, going to Paris. When I got out 19 hours later in Paris, I was heads over heels in love with this guy."