Stephens was approached by Josh Schwartz and Stephanie Savage, the show's existing executive producers, having previously worked with them on The OC.
"I was a big fan of Gossip Girl - probably embarrassingly big for a 36-year-old man - so that, and the prospect of working with Stephanie and Josh again, meant I probably would have worked on the show for free," said Stephens. "It was a real bonus when they offered to pay me."
Stephens will also develop new shows for Gossip producer Warner Brothers Television under the deal.
