This is one of my favorite screwball comedies -- a very smart movie with a sharp screenplay that never lags. In the same subversive spirit as Miracle of Morgan's Creek (another favorite film) - and builds to a similar stunning, hilarious, code-breaking climax. The script is beautifully structured and the performances are all terrific -- it's Irene Dunne's best film, and Elizabeth Risdon is wonderful in a smaller role as the aunt. Very underrated, don't miss it (check out James Harvey's insights on the film in his marvelous book, "Romantic Comedy").