Vampire Diaries stars Ian Somerhalder and Nina Dobrev tried to fight off their connection, but their undeniable attraction couldn't be ignored. Ashton Kutcher and Mila Kunis waited years to start dating after they co-starred in That '70s Show. Click through the gallery of couples whose characters fell in love just before they did: In Love On and Off the Screen! 9 Celebrity Couples Who Mix Business and Pleasure
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