Leighton Meester: Ballgown Beauty!

Leighton Meester keeps warm in a long cardigan while wearing a beautiful blue ballgown on the set of Gossip Girl on Thursday (July 28) in Manhattan, NYC.

The 25-year-old actress also filmed scenes while wearing a pretty blue floral sundress.

Earlier in the day, Leighton was spotted walking around set with Elizabeth Hurley, who has a story arc on the CW series.

Earlier this month, Leighton stopped by the Just Jared Studio presented by Lacoste and chatted about her latest film Monte Carlo – she even gave a sneak peek of one of her new songs!

10+ pics inside of Leighton…