Blake Lively & Leighton Meester: 'Gossip Girl' Duo!

Blake Lively and Leighton Meester share a shocking moment on the set of their hit show Gossip Girl on Thursday (August 2) in New York City.

The 24-year-old actress and Leighton, 26, were hard at work filming late night scenes near Madison Square Park for the sixth and final season of the show.

PHOTOS: Check out the latest pics of Blake Lively

Earlier in the day, Blake was spotted chatting on her cell phone while on set of the CW drama with Penn Badgley and Chace Crawford.

FYI: Leighton is wearing a RED Valentino dress and Brian Atwood zebra “Hamper” pumps. Blake is carrying the Oscar de la Renta Marelia bag.