- John Mills
- Major Harvey
- Cecil Parker
- Col. Logan
- Patrick Allen
- Col. Mathers
- Patrick Holt
- Col. Dawson
- Leslie Phillips
- Major Tennant
- Michael Hordern
- Governor of Gibraltar
- Marius Goring
- Nielson
- Barbara Hicks
- Hester
- Duncan Lamont
- Wing Cdr. Bates
- Anthony Sagar
- Guard Sergeant (Villa)
- John Gale
- Flight Lt. Osborne
- Kenneth J. Warren
- F / O Davies (as Kenneth Warren)
- James Hayter
- Sgt. Adams
- Sidney James
- Porter Y.M.C.A.
- Brian Weske
- Despatch Rider
- Harry Fowler
- Civilian (End Scene)
- Martin Shaban
- War Correspondent
- Bill Nagy
- American Captain
- Edward Judd
- Another Soldier
- Victor Maddern
- Orderly Sergeant
- Desmond Roberts
- Brigadier
- Bryan Forbes
- Young Lieutenant
- Victor Beaumont
- Gottmann (Commando)
- Alfie Bass
- The Small Man
- Ronald Wilson
- American Driver
- John Le Mesurier
- Adjutant R.A.P.C.
- Walter Gotell
- German Colonel
- George Eugeniou
- Garcia
- John G. Heller
- German Sergeant
- Frederick Jaeger
- Junior German Officer
- David Davies
- Control M.P.
- David Lodge
- Sergeant R.A.P.C.
- MacDonald Parke
- American General
- Marne Maitland
- Arab Proprietor
- Vera Day
- Angela
- Maureen Connell
- Peggy
- Sam Kydd
- Go-Between
- Allan Cuthbertson
- Guards Officer
- Ronnie Stevens
- M.I.5. Tail
- M.E. Clifton James
- M.E. Clifton James / General Montgomery (as M. E. Clifton James)
- Jack Armstrong
- Sleeping Officer
- John Bailey
- British Soldier
- Diana Beaumont
- Barmaid
- Michael Bell
- American M.O.
- Steven Berkoff
- Minor Role
- Nigel Bernard
- American Officer
- Michael Bird
- Publican
- Douglas Blackwell
- Duty Sergeant
- Ernest Blyth
- American Army Officer
- Eddie Boyce
- American Officer
- Derek Briggs
- Driver
- David Browning
- British Sergeant-Driver
- Max Butterfield
- Guards Officer
- Freddy Clark
- Orderly in Tent
- Mike Conner
- American Officer
- Patrick Connor
- Soldier in Tent
- Dan Darnelli
- British Officer
- John Dunbar
- Policeman
- Mabel Etherington
- Lady Leaving Cinema
- Roy Everson
- Military Policeman
- Max Faulkner
- British Sentry
- Eric Francis
- Commissionaire
- Otto Friese
- Other Officer
- Charles Gilliard
- Commuter
- Patrick Halpin
- American Officer
- Gordon Harris
- Staff Sergeant
- Geoffrey Hibbert
- Cpl. Cooper
- George Holdcroft
- American Officer
- Ned Lynch
- American Officer
- Alfred Maron
- Soldier in Tent
- Pat Meehan
- Lieutenant / Military Policeman (uncredited)
- Lola Morice
- Lady in Cinema
- Norman Morris
- Villa Guard
- Fred Nicholas
- Lieutenant Colonel Carlton
- Michael Oliver
- Guards Officer
- Paul Phillips
- Soldier in Cinema
- Dido Plumb
- Arab Tailor
- Donald Price
- Guard Commander
- Ernie Priest
- American Officer
- Tony Spears
- American Officer
- Philip Stewart
- American Officer
- Reg Thomason
- Soldier in Cinema
- Martin Voss
- Officer
- Robert Vossler
- American Officer
- Ernst Walder
- U-Boat Mate
- Eric Wetherell
- American Officer
- Ian Whittaker
- Soldier in Tent
- Paula Wright
- Lady in Cinema
- Johnny Wyne
- American Officer
