Leighton Meester takes a big bite out of her pretzel in between takes on the set of Gossip Girl on Thursday (June 7) in NYC.

Shooting for the new season of the show just began and the 25-year-old actress filmed scenes walking outside the Museum of Natural History in orange Brian Atwood “Maniac” pumps.

JJJ just got a sneak peek of the new GG book, “Psycho Killer” due out in October.

“Psycho Killer”, written by Cecily Von Ziegesar, reimagines Blair Waldorf and Serena van der Woodsen as trendsetting serial killers.

Cecily told Publishers Weekly, “I have a sort of evil sense of humor and I thought this would be a perfect opportunity to do a dark comedy—darker than the comedy that is already in ‘Gossip Girl’ novels.”

30+ pics inside of Leighton…