Chevy Chase and his National Lampoon's Christmas Vacation co-stars have reunited for a new U.S. Tv ad. The funnyman, who played bumbling Clark Griswold in the 1989 festive comedy, has recreated the movie's classic house-lighting scene with his onscreen wife, Beverly D'Angelo, and their daughter Juliette Lewis for a new Tv commercial for U.S. clothing and accessories store Old Navy.