longest celebrity relationships in Hollywood that prove that love can last

Prince William and Kate Middleton: 17 years

Prince William and Kate Middleton met as students at St. Andrews University in 2004. They parted ways in 2007 briefly, only to get back together later that year. They got engaged in 2010 and had a totally over-the-top royal wedding in 2011.

And though they are royals, Kate and William made it clear that they have a fun-loving relationship like everyone else.

"Obviously we both have a very fun time together, both have a very good sense of humor about things, we're down to earth, we take the mickey out of each other a lot, and she's got plenty of habits that make me laugh that I tease her about," Prince William said during their engagement.

They have three children together: George, Charlotte, and Louis.