Popsugar Celebrity Billy Baldwin Photos of Gossip Girl Cast Filming Season Three 25 February 2010 by POPSUGAR Celebrity UK 0 Shares View On One Page Photo 0 of 10 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 0 Photos of Gossip Girl Cast Filming Season Three Previous Next Start Slideshow Billy BaldwinPenn BadgleyChace CrawfordGossip GirlBlake Lively