Joshua Ian Schwartz
According to Wikipedia: "Joshua Ian Schwartz (born August 6, 1976) is an American screenwriter and television producer. Schwartz is best known for creating and executive producing the Fox teen drama series The O.C. which ran for 4 seasons. Schwartz is also known for developing The CW's series Gossip Girl based on the book of the same name and for co-creating NBC's action-comedy-spy series, Chuck."