- Terry-Thomas
- Capt. Romney Carlton-Ricketts
- George Cole
- 'Flash' Harry
- Joyce Grenfell
- Sgt. Ruby Gates
- Alastair Sim
- Miss Amelia Fritton
- Sabrina
- Virginia
- Lionel Jeffries
- Joe Mangan
- Lloyd Lamble
- Superintendent Samuel Kemp-Bird
- Raymond Rollett
- Chief Constable
- Terry Scott
- Police Sergeant
- Ferdy Mayne
- Italian Police Inspector
- Thorley Walters
- Major
- Cyril Chamberlain
- Captain
- Ronald Ibbs
- Lieutenant
- Judith Furse
- Dame Maud Hackshaw
- Michael Ripper
- Eric - The Liftman
- Kenneth Griffith
- Charlie Bull
- Richard Wattis
- Manton Bassett
- Peter Jones
- Prestwick
- Lisa Lee
- Miss Brenner
- Guido Lorraine
- Prince Bruno
- Alma Taylor
- Prince Bruno's Mother
- Peter Elliott
- Equerry
- Charles Lloyd Pack
- Henry Roberts - Prison Governor
- Lisa Gastoni
- Myrna Mangan
- Jose Read
- Cynthia Meadows
- Dilys Laye
- Bridget Strong
- Rosalind Knight
- Annabel
- Pat Laurence
- Mavis
- Marigold Russell
- Marjorie
- Vikki Hammond
- Jane Osborne
- Nicola Braithwaite
- Daphne
- Janet Bradbury
- Mercia
- Mandy Harper
- Tilly
- Moya Francis
- Bissy
- Eric Barker
- Culpepper Brown
- John Adams
- Constable
- Wendie Adams
- Schoolgirl
- William Baskiville
- Press Photographer
- Dorothy Batley
- Woman on train - Mrs. Roberts
- Diana Beevers
- Schoolgirl
- Ernest Blyth
- Wedding Guest
- Peter Brace
- New teacher
- Jim Brady
- Workman
- Paddy Brannigan
- Crook
- Marianne Brauns
- Fluffy
- Edwina Carroll
- Bit Part
- Tony Castleton
- Water Polo Spectator
- Pauline Chamberlain
- Water Polo Spectator
- Mike Conner
- Parent
- Alistair Dick
- Constable
- Lesley Dudley
- Schoolgirl
- Norman Fisher
- Water Polo Spectator
- Bernard Fox
- Photographer
- Rex Garner
- Waiter
- Alex Graham
- Waiter
- Victoria Harrington
- Bit Part
- Janice Hawley
- Schoolgirl
- George Hilsdon
- Water Polo Spectator
- Arthur Howell
- Water Polo Spectator
- Jemma Hyde
- Schoolgirl
- Philip Johns
- Water Polo Spectator
- Jenny Jones
- Schoolgirl
- Vivienne Lacey
- Bit Part
- Jane Lamb
- Schoolgirl
- Aileen Lewis
- Actress in Play
- Leonard Llewellyn
- Guest
- Frank Maher
- Soldier dancing with Bridget Strong
- Jack Mandeville
- Water Polo Spectator
- Jack May
- Workman
- Wensley Pithey
- Brigadier
- Charles Price
- New Teacher
- Mavis Ranson
- Bit Part
- Bob Raymond
- Waiter
- Robert Rietty
- Policeman
- Johnny Rossi
- Cafe Patron
- Terry Sartain
- Parent
- Lesley Scoble
- Schoolgirl
- Teri Scoble
- Schoolgirl
- Ian Selby
- Water Polo Spectator / Wedding Guest (uncredited)
- Bill Shine
- Policeman
- Esme Smythe
- Guest
- Fred Stroud
- Water Polo Spectator
- Jackie Swainson
- Schoolgirl
- Del Watson
- New Teacher
- Angela White
- Schoolgirl
- Carol White
- Schoolgirl
- Winnie Wiblin
- Water Polo Spectator
- Lynn Williams
- Bit Part
