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Cecil Parker as Arthur Prohack |
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Dirk Bogarde as Charles Prohack |
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Hermione Baddeley as Eve Prohack |
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Sheila Sim as Mary Prohack |
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Glynis Johns as Mimi Warburton |
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Denholm Elliott as Oswald Morfrey |
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Jon Pertwee as Plover |
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Heather Thatcher as Lady Maslam |
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Campbell Cotts as Sir Paul Spinner |
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Bryan Forbes as Tony |
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Frederick Valk as Dr. Viega |
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Charles Goldner as Polish Man Servant |
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Russell Waters as Cartwright |
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Henry Edwards as Sir Digby Bunce |
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James Hayter as Carrell Quire |
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Ada Reeve as Mrs. Griggs |
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Frances Waring as Nursie |
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Judith Furse as Laura Postern |
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Frederick Leister as The Director General |
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Elwyn Brook-Jones as Benny Erivangian |
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Eric Berry as Tailor's Assistant (uncredited) |
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Janet Burnell as Mr. Prohack's Personal Assistant (uncredited) |
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Ian Carmichael as Hat Salesman (uncredited) |
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Anne Gunning as Actress (uncredited) |
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Humphrey Heathcote as Turkish Bath Attendant (uncredited) |
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Desmond Newling as Pageboy (uncredited) |
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Lloyd Pearson as Mr. Bishop (uncredited) |
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Stanelli as Orchestra Leader (uncredited) |
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Jerry Verno as Taxi Driver (uncredited) |
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Sam Lysons as Club Porter |
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Charles Perry as Butler |
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Robert Vossler as Party Guest |
| Directing | Thornton Freeland | Director |
| Writing | Arnold Bennett | Novel |
| Writing | Donald Bull | Writer |
| Writing | Ian Dalrymple | Writer |
| Production | Ian Dalrymple | Producer |
| Sound | Temple Abady | Original Music Composer |
| Editing | Sidney Stone | Editor |
| Camera | H.E. Fowle | Director of Photography |
| Writing | Edward Knoblock | Theatre Play |
| Sound | George Paternoster | Boom Operator |
| Camera | Max Rosher | Still Photographer |
| Production | Dennis Van Thal | Associate Producer |
| Art | Frederick Pusey | Art Direction |
| Costume & Make-Up | Beatrice Dawson | Costume Design |
| Costume & Make-Up | Betty Baugh | Hairstylist |
| Costume & Make-Up | Jim Hydes | Makeup Artist |
| Production | Raymond Anzarut | Production Manager |
| Directing | Geoffrey Lambert | Assistant Director |
| Sound | Stanley Lambourne | Sound Mixer |
| Sound | Peter Seabourne | Sound Editor |
| Camera | Robert Huke | Camera Operator |
| Costume & Make-Up | Evelyn Brierley | Costume Supervisor |
| Sound | Muir Mathieson | Conductor |
| Directing | Pauline Roberts | Continuity |
