John Paddy Carstairs Director David Tomlinson Basil Topham Actor Petula Clark Julie Topham Actor Sonja Ziemann Marta Actor A.E. Matthews Grandpa Actor Charles Victor Mr. Topham Actor Sophie Stewart Mrs. Topham Actor Richard Wattis The vicar Actor Athene Seyler Miss Honeycroft Actor Philip Stainton Mr. Grimes Actor Ferdy Mayne Istfan Actor Alfie Bass Mr. Jenkins Actor Dora Bryan Mrs. Jenkins Actor Michael Brennan Sgt. Marne Actor George H. Brown Writer William Douglas-Home Writer