They split in July 2012 after Kristen was spotted locking lips with director Rupert Sanders.
And while they briefly seemed to be working things out for the final fans fell head over heels for Ian's portrayal of bad boy vampire Damon, and clearly Nina felt the same way.
They met on set in 2008, when Kristen was still dating Michael Angarano.
Sure, Leighton Meester's daughter isn't even old enough to roll over yet, let alone pick out a perfect play date outfit, but no matter. News confirmed that she and hubby Adam Brody recently welcomed their first child together and, naturally, fans are over the moon about Blair Waldorf and Serena van der Woodsen finally being mommies at the same time.
Meaning, though Arlo Day Brody is not even two months old, she's already being squad-goaled into a BFFship with Blake Lively's daughter James.
The actress' portrayal of the blonde beauty helped make her a fashion icon, but she later told Allure she wasn't thrilled about the character in real life.
X Ohhhhh." Lively and Crawford starred as Serena and Nate for a six-season run from 2007 to 2012.
The 28-year-old actress shared a screenshot of former co-star Chace Crawford on Instagram after watching The CW show's series premiere. "It doesn't help when everybody is dating who they're dating on the show, and you're also saying to the costume designer, 'Hey, can I take that home?