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Daphne Guinness (born November 9, 1967) is a socialite, journalist, and collector of haute couture. She is an heir to the Guinness beer fortune. In 1987, she married Greek shipping heir Spyros Niarchos, whom she divorced in 1999. She has three children, including Stavros Niarchos, the ex-boyfriend of Mary-Kate Olsen and Paris Hilton.