May 18, 2013 - Michael Buckner/Getty Images Europe more pics like this »
Rachel Bilson And Hayden Christensen
Length of Engagement: 7 years

Actors Rachel Bilson and Hayden Christensen first began dating in 2007 after working together on the film Jumper, and got engaged within months. There was no rush to book the reception hall, though, and they went on to have a daughter, Briar Rose (named after Sleeping Beauty), in 2014. While their family was growing, the two ultimately decided they weren't right for each other and called it quits in 2017.