Though he doesn't directly name his Gossip Girl costar and ex-girlfriend Leighton Meester, the two dated from 2008 to 2010.

Sebastian Stan shared that he had his first "serious love" while filming Gossip Girl from 2007 to 2011 alongside costar ...

Sebastian Stan fondly looked back at a romance during his Gossip Girl era, presumably with ex-girlfriend Leighton Meester.

In an interview with Variety, Sebastian Stan took a look back at his time starring in "Gossip Girl," revealing that he was ...

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 ...

Spotted sporting Rigash’s Black Quilted Leather Skirt and Top, Meester looked every bit a beauty.

It looks like Sebastian Stan meant every one of his xoxos to Leighton Meester. The Gossip Girl alum revealed that he feels particularly nostalgic about his role as Carter Braizen on the CW series from ...

Sebastian Stan is making a romantic confession about his major love interest during his time on Gossip Girl.During an ...