
Blake Lively Flirts with Leighton Meester's Man

July 28 2009, Published 2:29 p.m. ET

Blake Lively was flirting up a storm with Gossip Girl co-star Leighton Meester's boyfriend, Sebastian Stan, on Monday — and Leighton was completely fine with it!
That's because the blonde beauty was actually filming a scene with Sebastian for the upcoming third season of the hit CW show. In fact, Leighton and Blake shot some clips of their own on an NYC park bench yesterday.
Also on hand to shoot on Monday were the show's lead hunks, Chace Crawford and Penn Badgley.
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