In addition to famous twins like Mary-Kate and Ashley Olsen, Benji and Joel Madden, and the Mowry sisters, there are a number of celebrities that you may not have known are part of a pair. Ashton Kutcher, Scarlett Johansson, Gisele Bündchen, and even Vin Diesel have twin siblings — and while some of their other halves keep a low profile, others have a place in show business as well. Keep reading to see 15 stars that you didn't know had a double!
They Have a Twin?!
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