Pictures of Katie Cassidy on set of Gossip Girl August 10, 2010 Recurring and Guest Stars News Click here to see photos of Katie Cassidy on the set of Gossip Girl. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window) Related