Gossip Girl star Leighton Meester and her beau, Sebastian Stan, are taking the next step, PageSix.com reports.

A source close to the starlet say the couple are engaged, and they made the announcement on their “secret” Facebook pages.

Meester and Stan have been dating since they met on the set of the show last year, when Stan played a character who was featured in two early episodes.

Meester’s rep had “no comment.”