Erle C. Kenton Director Mischa Auer Dr. Trenkle Actor Mary Boland Mrs. Berry Actor Edward Everett Horton Oliver Actor Helen Parrish Penny Actor Jackie Searl Randolph Actor Frankie Thomas Danny Actor Harold Huber Uncle Buck Actor David Oliver Footman Williams Actor Edward Eliscu Screenwriter Mortimer Offner Screenwriter George Robinson Cinematographer Bernard W. Burton Film Editing Jack Otterson Art Director Russell A. Gausman Set Decoration