Prince William and Kate Middleton
He gave her his mom's ring, and he seems to genuinely love her, so it seems like they're going to make it. But she may not be cut out for the pressure of being married to a prince, and their relationship may falter under the intensity of royal life. Let's give it 51:49 odds that Waity-Katy and Wills live happily ever after.
Probability they’ll last: 51 percent
Photo: Wireimage / The Nest