Blake Lively was spotted with a new co-star today -- and, sorry "Gossip Girl" fans, but it doesn't look like Serena van der Woodsen will be going back to Dan Humphry anytime soon.
Wearing a gorgeous grey, beaded dress, Lively was photographed kissing Sam Page while filming at The Met.
Though she was smooching Sam, her real life boyfriend is Penn Badgley, who's also on the show.
Lively's coming off of a great weekend -- her new movie "The Town" opened at #1 with $23mil.
