According to PageSix, Leighton Meester and her boyfriend Sebastian Stan are engaged!!  Leighton and Sebastian met on the set of Gossip Girl last year when he appeared on a couple of episodes and have been inseperable ever since.

According to the source, they have announced their engagement on the secret Facebook pages.  Leighton’s rep has no comment on this rumour.

What do you think?  Rumour or fact?

Photo:  WENN