- Screenwriter (Johnny Frenchman):
- T.E.B. Clarke
- Screenwriter (I Was Monty's Double):
- Bryan Forbes
- Author (I Was Monty's Double):
- M.E. Clifton James
- Producer (Johnny Frenchman):
- Michael Balcon
- Director (Johnny Frenchman):
- Charles Frend
- Producer (I Was Monty's Double):
- Maxwell Setton
- Director (I Was Monty's Double):
- John Guillermin
- Lanec Florrie:
- Francoise Rosay
- Nat Pomeroy:
- Tom Walls
- Sue Pomeroy:
- Patricia Roc
- Bob Tremayne:
- Ralph Michael
- Yan Kervarec:
- Paul Dupuis
- Zacky Penrose:
- Frederick Piper
- Steve Matthews:
- Arthur Hambling
- Charlie West:
- Richard George
- Dick Trewhiddle:
- Bill Blewett
- Joe Pender:
- James Harcourt
- Tim Bassett:
- Richard Harrison
- Sam Olds:
- Stanley Paskin
- Tom Hocking:
- James Knight
- Jack Nicholas:
- Leslie Harcourt
- Sam Harvey:
- John Stone
- 'Monty' and himself:
- M.E. Clifton James
- Major Harvey:
- John Mills
- Col Logan:
- Cecil Parker
- Col Matthers:
- Patrick Allen
- Col Dawson:
- Patrick Holt
- Major Tennant:
- Leslie Phillips
- Governor of Gibraltar:
- Michael Hordern
- Nielson:
- Marius Goring
- Hester:
- Barbara Hicks
- Wing-Cmdr Bates:
- Duncan Lamont
- Guard sergeant:
- Anthony Sagar
- First guard:
- Max Butterfield
- Second guard:
- Michael Oliver
- Flt-Lt Osborne:
- John Gale
- FO Davies:
- Kenneth Warren
- Porter, YMCA:
- Sidney James
- Sgt Adams:
- James Hayter