Sebastian Stan hints 'Gossip Girl' costar Leighton Meester was his first "serious relationship," saying, "It was the first time I was in serious love with somebody."

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,

Sebastian Stan has sent fans of the iconic TV show Gossip Girl wild as he revealed his first “serious love” was on the show. Sebastian reminisced about how he fell in love for the first time while on Gossip Girl. The actor made the shocking confession in a new interview with Variety.

Stan and Meester dated from 2008 to 2010 after meeting on the set of 'Gossip Girl' Getty(2) Sebastian Stan and Leighton Meester Sebastian Stan is looking back at his first time falling in love. The 42-year-old actor opened up to Variety about his first serious relationship while reflecting on his time on the hit TV show,

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 2007 to 2011 due to the significance of his relationship at the time.