Sebastian Stan fondly looked back at a romance during his Gossip Girl era, presumably with ex-girlfriend Leighton Meester. "It was the first time I was in serious love with somebody," Stan, 42, told Variety in an interview published on Thursday,

In an interview with Variety, Sebastian Stan took a look back at his time starring in "Gossip Girl," revealing that he was "in serious love" for the first time while appearing on the show.

Adam Brody, my teenage crush from The O.C., recently talked about his marriage to my teenage hero, Leighton Meester from Gossip Girl, on Dax Shepherd’s Armchair Expert podcast. When it comes to the business side of things, “Everything is run through each other,” Brody said.

Though he doesn't directly name his Gossip Girl costar and ex-girlfriend Leighton Meester, the two dated from 2008 to 2010. Stan — who played Carter Baizen on Gossip Girl — appeared in 11 episodes from 2007-2010. He's avoided publicly discussing his relationships over the years, but he spoke highly about Meester during their time together.

Sebastian Stan shared that he had his first "serious love" while filming Gossip Girl from 2007 to 2011 alongside costar Leighton Meester, who he split with in 2010 following two years of dating.