Ed Westwick Phones it in on Set (PHOTOS)

Hold the phone, everybody, Ed Westwick has an important call to make!

The Gossip Girl heartthrob took time out on set in New York on Monday to drop a line to an acquaintance, and judging from the expression on his face, he was giving the person on the other end of the call a mouthful. A big, sexy, luscious mouthful.

Who do you think he was talking to? Let us know in the comments section after clicking through the photo gallery.