Terry-Thomas as Capt. Romney Carlton-Ricketts

George Cole as "Flash" Harry

Joyce Grenfell as Sgt. Ruby Gates

Alastair Sim as Miss Amelia Fritton

Sabrina as Virginia

Lionel Jeffries as Joe Mangan

Lloyd Lamble as Superintendent Samuel Kemp-Bird

Raymond Rollett as Chief Constable

Terry Scott as Police Sergeant

Ferdy Mayne as Italian Police Inspector

Thorley Walters as Major Whitehart

Michael Ripper as Eric - The Liftman

Cyril Chamberlain as Army Captain

Ronald Ibbs as Lieutenant

Judith Furse as Dame Maud Hackshaw

Kenneth Griffith as Charlie Bull

Richard Wattis as Manton Bassett

Peter Jones as Prestwick

Lisa Lee as Miss Brenner

Guido Lorraine as Prince Bruno

Alma Taylor as Prince Bruno's Mother

Peter Elliott as Equerry

Charles Lloyd Pack as Henry Roberts - Prison Governor

Lisa Gastoni as Myrna Mangan

Dilys Laye as Bridget Strong

Rosalind Knight as Annabel

Marigold Russell as Marjorie

Nicola Braithwaite as Daphne

Mandy Harper as Tilly

Eric Barker as Culpepper Brown

Jose Read as Cynthia Meadows

Pat Laurence as Mavis

Vikki Hammond as Jane Osborne

Janet Bradbury as Mercia

Moya Francis as Bissy

Lesley Scoble as Schoolgirl (uncredited)

Angela White as Schoolgirl (uncredited)

Carol White as Schoolgirl (uncredited)

Edwina Carroll as