- Peter Sellers
- Dodger Lane
- David Lodge
- Jelly Knight
- Bernard Cribbins
- Lennie Price
- Wilfrid Hyde-White
- Soapy Stevens
- Maurice Denham
- The Governor
- Lionel Jeffries
- Chief P.O. Crout
- Irene Handl
- Mrs. Price
- Liz Fraser
- Ethel
- Beryl Reid
- Miss Pringle
- Noel Hood
- Miss Prescott
- Myrette Morven
- Miss Meakin
- George Woodbridge
- Chief P.O. Jenkins
- Edwin Brown
- Warder Charlie
- Cyril Chamberlain
- Gate Warder - Day
- Wallas Eaton
- Gate Warder - Night
- Andrew Downie
- Garden Warder
- William Abney
- Visiting Room Warder
- Thorley Walters
- Col. Parkright
- John Wood
- Captain
- Robert James
- Police Superintendent
- Walter Hudd
- Rev. Patterson
- Mario Fabrizi
- Jones
- Warren Mitchell
- Tailor
- John Glyn-Jones
- Lawyer
- Arthur Mullard
- Fred
- Vivienne Martin
- Fred's Wife
- Joe Gibbons
- Dustman
- Ian Wilson
- Milkman
- Edward Dentith
- Detective
- John Harvey
- Governor Rockhampton Prison
- Johnny Vyvyan
- Shorthouse
- Harry Littlewood
- Postman
- Homi Bode
- Court Chamberlain
- John Adams
- Police Inspector
- Jack Armstrong
- Vicar
- Del Baker
- Soldier
- Abe Barker
- Sam - Oldest Inhabitant
- Joe Beckett
- Prisoner
- Eddie Boyce
- Army Corporal
- Robin Burns
- Prisoner
- Ted Carroll
- Modeling Prisoner
- Tony Castleton
- Prisoner
- Harold Coyne
- Prisoner
- Dan Darnelli
- Vicar
- Robert Day
- Minor Role
- Jack Dearlove
- Postman
- Olga Dickie
- Woman in Pub
- Tony Doonan
- Prisoner in Garden
- Eynon Evans
- Solicitor
- George Hilsdon
- Harold
- George Holdcroft
- Prisoner
- Lindsay Hooper
- Soldier / Driver (uncredited)
- Tommy Jenkins
- Prisoner
- Gerry Judge
- Constable
- Frederick Kelsey
- Vicar
- Alf Mangan
- Prisoner
- Jack May
- Prison Visitor
- Manny Michael
- Prisoner / Security Van Guard (uncredited)
- John More
- Prisoner
- Guy Standeven
- Prisoner
- Larry Taylor
- Rockingham Quarry Prison Warder
- Joe Wadham
- Security Van Driver
- Hedger Wallace
- Detective
