PENN BADGLEY: 2008 - 2010

Spotted: Gossip Girl's resident couple taking their romance off screen in 2008. After Badgley gushes to PEOPLE that his costar is "an amazing person and she's beautiful," life imitates art when the two are photographed kissing in a pool during a romantic getaway to Mexico. However, like their on-screen counterparts, they split in October 2010, a month after Lively told Allure, "I don't comment on my relationships."