Kim Novak as Carly Hardwicke

Jack Lemmon as Bill Gridley

Fred Astaire as Franklyn Ambruster

Lionel Jeffries as Inspector Oliphant

Estelle Winwood as Mrs. Dunhill

Maxwell Reed as Miles Hardwicke

Philippa Bevans as Agatha Brown

Henry Daniell as Stranger

Ronald Long as Coroner

Richard Peel as Dillings

Doris Lloyd as Lady Fallott

Bess Flowers as Courtroom Spectator (uncredited)

Leoda Richards as Trial Spectator (uncredited)

Iris Bristol as Agatha (uncredited)

Leon Alton as Courtroom Spectator (uncredited)

Al Bain as Courtroom Spectator (uncredited)

Frank Baker as Bar Patron (uncredited)

Brandon Beach as Juror (uncredited)

Marjorie Bennett as Autograph Seeker (uncredited)

Barry Bernard as Attendant (uncredited)

Paul Bradley as Lamplighter Patron (uncredited)

Ross Brown as Boy (uncredited)

William Burnside as Bar Patron (uncredited)

Boyd Cabeen as Lamplighter Patron (uncredited)

Charles Cirillo as Courtroom Spectator (uncredited)

Laurence Conroy as Clerk (uncredited)

Paul Cristo as Lamplighter Patron (uncredited)

Dick Crockett as Detective Carstairs (uncredited)

Ogden Dangerfield as Reporter (uncredited)

Scott Davey as Henry (uncredited)

Carter DeHaven as Old Man (uncredited)

Harry Denny as Lamplighter Patron (uncredited)

George DeNormand as Neighbor (uncredited)

Tom Dillon as Coroner's Official (uncredited)

Minta Durfee as Juror (uncredited)

Anthony Eustrel as Man (uncredited)

Joe Evans as Waiter (uncredited)

Betty Fairfax as Woman in Bathrobe (uncredited)

Alex Finlayson as Reporter (uncredited)

Charles Fogel as Courtroom Spectator (uncredited)

Raoul Freeman as Courtroom Spectator (uncredited)

Brian Gaffikin as BBC Anchorman (uncredited)

James Gonzalez as Bar Patron (uncredited)

Clive Halliday as Man (uncredited)

Jackson Halliday as Reporter (uncredited)

Sam Harris as Courtroom Spectator (uncredited)

Bryan Herbert as Claude - Husband & Father (uncredited)

George Holmes as Bailiff (uncredited)

Jimmie Horan as Courtroom Spectator (uncredited)

David Hughes as Old Man (uncredited)

Harold Innocent as Young Escort (uncredited)

John Uhler Lemmon II as Old Man in Wheelchair (uncredited)

Queenie Leonard as Woman (uncredited)

Jack Livesey as Counsel (uncredited)

James Logan as Bobby (uncredited)

Robert Locke Lorraine as Lamplighter Patron (uncredited)

Murray Matheson as Neighbour (uncredited)

Eric Micklewood as Man with a Hangover (uncredited)

Harold Miller as Lamplighter Patron (uncredited)

Clive Morgan as Man in Smoking Jacket (uncredited)

Bru Mysak as Ambruster's Driver (uncredited)

Mavis Neal Palmer as Woman (uncredited)

Ottola Nesmith as Flower Woman (uncredited)

Mary O'Brady as Mrs. Oliphant (uncredited)

Monty O'Grady as Lamplighter Patron (uncredited)

Tudor Owen as Farmer (uncredited)

Joe Palma as Reporter (uncredited)

Milton Parsons as Mysterious Man (uncredited)

George Pelling as Ticket Agent (uncredited)

Paul Power as Courtroom Spectator (uncredited)

Fred Rapport as Juror (uncredited)

Tony Regan as Charles - Nightclub Waiter (uncredited)

Clark Ross as Waiter (uncredited)

John Roy as Bar Patron (uncredited)

Mark Russell as Lamplighter Patron (uncredited)

Benno Schneider as Man (uncredited)

Julie Scott as Floosy (uncredited)

Mary Scott as Waitress (uncredited)

Mabel Smaney as Courtroom Spectator (uncredited)

Jacqueline Square as Woman Reporter (uncredited)

Michael St. Clair as Fire Chief (uncredited)

Martin Strader as Courtroom Spectator (uncredited)

Tom Symonds as Alf (uncredited)

Towyna Thomas as Dowager (uncredited)

Arthur Tovey as Lamplighter Patron (uncredited)

Cicely Walper as Woman (uncredited)

Gwendolyn Watts as Wife (uncredited)

Nelson Welch as Old Man (uncredited)

Cecil Weston as Woman (uncredited)

Frederick Worlock as Elderly Colonel (uncredited)

Florence Wyatt as Ambruster's Secretary (uncredited)