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

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

The actor explained how he and Meester advise each other on work projects JP Mangalindan is a Senior Writer for TV at PEOPLE.

It looks like Sebastian Stan meant every one of his xoxos to Leighton Meester. The Gossip Girl alum ... who were together for three years during the show's later run. While playing one of TV's most ...

On February 18, Us Weekly confirmed that Meester and Brody had tied the knot in a secret wedding, according to multiple sources. "Leighton ... Show. The O.C. actor spoke about his new movie ...

Adam Brody and Leighton Meester have a lot of input on each other's career choices. During an interview for the Armchair ...

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Sebastian Stan has sent fans of the iconic TV show Gossip Girl wild as he revealed his first “serious love” was on the show.