Cesar Romero as Luigi

Kay Kendall as Barbara Gale

Victor Maddern as Danny 'Limpy' Thomas

Edward Underdown as Det. Insp. Johnstone

Simone Silva as Angele Abbé

Liam Gaffney as Constable Fred Roberts

Bill Travers as Nigel Langley - Barbara's date

Molly Hawley-Clifford as "Starry" Darryl

John Penrose as Gerald Gale

Robert Cawdron as Det. Sgt. Hadley

Henry Purvis as Starry's Brother

Paul Hardtmuth as V. H. Mayall

Eileen Way as Mrs. Thoms

Tony Sympson as Nicky the Burgler

Fred Griffiths as Cabbie

Jack Howarth as Limpy's Landlord

Harry Purvis as Darrell

Rose McLaren as Rose

Howard Lang as Card Player (uncredited)