Donald Ogden Stewart (November 30, 1894 – August 2, 1980) was an American writer and screenwriter best known for his sophisticated golden age comedies and melodramas such as The Philadelphia Story (based on the play by Philip Barry), Tarnished Lady and Love Affair. Stewart worked with a number of the directors of his time, including George Cukor (a frequent collaborator), Michael Curtiz and Ernst Lubitsch. Stewart was a member of the Algonquin Round Table and, with Ernest Hemingway's friend Bill Smith, the model for Bill Gorton in The Sun Also Rises. His 1922 parody on etiquette, Perfect Behavior, published by George H. Doran and Co., was a favourite book of P. G. Wodehouse. Source: Wikipedia (en)