George Sanders

Robert Fleming

Lucille Ball

Sandra Carpenter

Charles Coburn

Harley Temple

Boris Karloff

Charles van Druten

Cedric Hardwicke

Julian Wilde

Joseph Calleia

Nicholas Moryani

Alan Mowbray

Lyle Maxwell

George Zucco

H.R. Barrett

Robert Coote

Detective Wilson

Alan Napier

Detective Gordon

Tanis Chandler

Lucy Barnard

Ann Codee

Matilda

Jimmy Aubrey

Nelson (uncredited)

Jack Chefe

Pierre (uncredited)

Charles Coleman

Sir Charles (uncredited)

Gerald Hamer

Harry Milton (uncredited)

Eddie Parks

Oswald Pickering (uncredited)

Dorothy Vaughan

Mrs. Miller (uncredited)

Herbert Evans

Fleming's Butler (uncredited)

Isabel La Mal

Dowager Shushing Fleming at Concert (uncredited)

Marjorie Hoshelle

Robert's Rejected Girlfriend (uncredited)

Ethan Laidlaw

Man in Dance Hall (uncredited)

Mike Lally

Mike (uncredited)

Ethelreda Leopold

Blonde Nightclub Singer (uncredited)

Annette Warren

Blonde Nightclub Singer (uncredited)

Shep Houghton

Nightclub Patron (uncredited)

Sol Murgi

Nightclub Patron (uncredited)

Brooks Benedict

Concertgoer (uncredited)

Carl M. Leviness

Concertgoer (uncredited)

Wilbur Mack

Concertgoer (uncredited)

Frank McLure

Concertgoer (uncredited)

Jeffrey Sayre

Concertgoer (uncredited)

Sayre Dearing

Concertgoer in Lobby (uncredited)

Harold Miller

Concertgoer in Lobby (uncredited)

Cyril Delevanti

Medical Examiner (uncredited)

Wyndham Standing

Assistant Medical Examiner (uncredited)

Florence Wix

Blue Eyes (uncredited)