Peter Sellers as Dodger Lane

Wilfrid Hyde-White as Soapy Stevens

Maurice Denham as Governor Horatio Bennett

Irene Handl as Mrs. Price

David Lodge as Jelly Knight

Lionel Jeffries as Chief Prison Officer Sidney Crout

Liz Fraser as Ethel

Bernard Cribbins as Lennie Price

Beryl Reid as Miss Pringle

Walter Hudd as Reverend Patterson

George Woodbridge as Chief Prison Officer Jenkins

John Glyn-Jones as Lawyer

Cyril Chamberlain as Day Gate Warder

Noel Hood as Miss Prescott

Wallas Eaton as Night Gate Warder

Mario Fabrizi as Jones

Thorley Walters as Colonel Parkright

Myrette Morven as Miss Meakin

Edwin Brown as Warder Charlie

Andrew Downie as Garden Warder

William Abney as Visiting Room Warder

John Wood as Captain

Robert James as Police Superintendent

Warren Mitchell as Tailor

Arthur Mullard as Fred

Vivienne Martin as Fred's Wife

Joe Gibbons as Dustman

Ian Wilson as Milkman

Edward Dentith as Detective

John Harvey as Rockhampton Prison Governor

Johnny Vyvyan as Shorthouse

Harry Littlewood as Postman

Homi Bode as Court Chamberlain

John Adams as Police Inspector (uncredited)

Jack Armstrong as Vicar (uncredited)

Del Baker as Soldier (uncredited)

Abe Barker as Sam (uncredited)

Joe Beckett as Prisoner (uncredited)

Eddie Boyce as Army Corporal (uncredited)

Robin Burns as Prisoner (uncredited)

Ted Carroll as Modelling Prisoner (uncredited)

Tony Castleton as Prisoner (uncredited)

Harold Coyne as Prisoner (uncredited)

Dan Darnelli as Vicar (uncredited)

Robert Day as Minor Role (uncredited)

Jack Dearlove as Postman (uncredited)

Olga Dickie as Woman in Pub (uncredited)

Tony Doonan as Prisoner in Garden (uncredited)

Eynon Evans as Solicitor (uncredited)

George Hilsdon as Harold (uncredited)

George Holdcroft as Prisoner (uncredited)

Lindsay Hooper as Soldier / Driver (uncredited)

Tommy Jenkins as Prisoner (uncredited)

Gerry Judge as Constable (uncredited)

Frederick Kelsey as Vicar (uncredited)

Alf Mangan as Prisoner (uncredited)

Jack May as Prison Visitor (uncredited)

Manny Michael as Prisoner / Security Van Guard (uncredited)

John More as Prisoner (uncredited)

Guy Standeven as Prisoner (uncredited)

Larry Taylor as Rockingham Quarry Prison Warder (uncredited)

Joe Wadham as Security Van Driver (uncredited)

Hedger Wallace as Detective (uncredited)