24-year-old Stavros Niarchos III, heir to a Greek shipping dynasty that once pitted his grandfather against Aristotle Onassis, is one sexy trustafarian. Reared in Paris, Niarchos went on to study film at the University of Southern California. There, he discovered the art of dating nubile young celebs and partying like…well, a Greek shipping heir. His female credits include Mary-Kate Olsen, Paris Hilton, and Lindsey Lohan. His destructive credits include crashing Paris Hilton’s Bentley and trashing a Las Vegas hotel room to the tune of $100,000. His business credentials are still budding—you can find him in kitesurfing magazines and DVDs, and in tabloids, cavorting with famous people—but his inheritance leaves him with little to worry about.