And it seems like most of the time, celebrities pair off with each other. Why date or marry a mere mortal when you could be with someone who understands the stress of your day-to-day life?
But not every A-lister is married to an equally famous star. There are plenty of celebs who've gone against the grain and married — gasp — regular people.
Of course, some celebrity spouses, like Kate Middleton, have become stars in their own right. But there was once a time when the Duchess of Cambridge really was one of us.