Here's another cute Gossip Girl photo for you.

Co-stars and on-set siblings Taylor Momsen and Penn Badgley got back in the swing of summer during a photo shoot Thursday at a New York playground. Wonder what the heck this scene is about ...

Penn Badgley and Taylor Momsen on the Gossip Girl set.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.