The Mouthpiece
A prosecutor quits his job and becomes a defense attorney when he finds out that a man he got convicted and executed was actually innocent.
Warren William
Vincent 'Vince' Day
Sidney Fox
Celia Farraday
Aline MacMahon
Miss Hickey, Day's Secretary
John Wray
Mr. Barton
Mae Madison
Elaine
Ralph Ince
J.B. Roscoe
Morgan Wallace
E.A. Smith
Guy Kibbee
Bartender
J. Carrol Naish
Tony Rocco
Walter Walker
District Attorney Forbes
Stanley Fields
Mr. Pondapolis
Murray Kinnell
Thompson, Day's Butler
Noel Francis
Miss DeVere
William Janney
John 'Johnny' Morris
Emerson Treacy
Robert Wilson (Uncredited)
Jack La Rue
Joe Garland (Uncredited)
Polly Walters
Gladys (Uncredited)
Berton Churchill
Rocco Trial Judge (Uncredited)
Davison Clark
Detective Arresting Garland (Uncredited)
Kenne Duncan
Office Worker (Uncredited)
Helena Phillips Evans
Crying Prospective Client (Uncredited)
Willie Fung
Chinese Waiter (Uncredited)
Paulette Goddard
Platinum Blonde at Party (Uncredited)
John Kelly
Cab Driver (Uncredited)
Hector Sarno
The Gardener-Murderer (Uncredited)
Eric Wilton
Maitre d' (Uncredited)
Charles Lane
Hotel Desk Clerk (Uncredited)
Selmer Jackson
Prison Clerk (Uncredited)
Pedro Regas
One of J.B.'s Henchmen (Uncredited)
Lew Harvey
One of J.B.'s Henchmen (Uncredited)
James Flood
Director
Frank J. Collins
Theatre Play
Joseph Jackson
Screenplay
Earl Baldwin
Adaptation
Elliott Nugent
Director
Barney McGill
Director of Photography
George Amy
Editor
Esdras Hartley
Art Direction
Earl Luick
Costume Design
William H. Cannon
Assistant Director
Earl Baldwin
Dialogue
Rufus Le Maire
Casting
Billy Gordon
Casting Assistant
William Maybery
Casting Assistant
Leo F. Forbstein
Conductor
Bernhard Kaun
Original Music Composer