Leighton Meester and Sebastian Stan pose at the Henri Bendel and YSL Beauty party on August 24, 2008 in New York City.
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CelebNews@Usmagazine.com! - Rep: Leighton Meester's Not Engaged

Attention Upper East Siders: Gossip Girl star Leighton Meester is not engaged.

The New York Post had reported that she and beau Sebastian Stan announced on their "secret" Facebook pages that they're getting hitched.

But Stan's rep tells Usmagazine.com, "He is not engaged."

Another source tells Us that the supposed Facebook pages are fake.

See what Gossip Girl stars looked like as kids.

A wedding may not be far off for the couple, who met on the set of their CW hit show.

In October, a source close to the actress told Us that Meester is "really in love" with Stan.

See sexy photos of Gossip Girl stars on the beach.

Said the source, "I think this is the first time she really sees a future with someone."

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