Summer Holiday is a 1948 American musical film, starring Mickey Rooney and Gloria DeHaven. The picture is based on the play Ah, Wilderness! (1933) by Eugene O'Neill, which had been filmed as under that name by MGM in 1935 with Rooney in a much smaller role. Though completed in October 1946, the film sat on the shelf until 1948. In addition to Walter Huston, the supporting cast features Frank Morgan as the drunken Uncle Sid, portrayed earlier by Wallace Beery on screen and later by Jackie Gleason on Broadway, as well as Marilyn Maxwell, Agnes Moorehead, Selena Royle and Anne Francis.