William Powell
Steve Ireland
Myrna Loy
Susan Ireland
Gail Patrick
Isobel Kimble Grayson
Jack Carson
Ward Willoughby
Florence Bates
Mrs. Cooper
Sidney Blackmer
Lawyer George Renny
Sig Ruman
Dr. Wuthering
Vladimir Sokoloff
Dr. David Klugle
Donald MacBride
'Pinky' Grayson
Sara Haden
Miss Cecilia Landis
Kathleen Lockhart
Mrs. Bristol
Fern Emmett
Martha - Ireland's Maid
Joseph Crehan
Judge
George Meeker
Lawyer DeWest
Clarence Muse
Robert - Hat Check Man at Party
Elisha Cook Jr.
Joe (elevator operator)
Barbara Bedford
Renny's Secretary (uncredited)
Aldrich Bowker
Jimmy - the Doorman (uncredited)
Edward Hearn
Policeman (uncredited)
George Irving
Sanity Hearing Doctor (uncredited)
May McAvoy
Sanity Hearing Secretary (uncredited)
Ian Wolfe
Sanity Hearing Doctor (uncredited)
Wanda Perry
Party Guest (uncredited)
Jimmy Ames
Taxi Driver (uncredited)
Joan Barclay
Telephone Operator (uncredited)
Mary Bayless
Party Guest (uncredited)
Wilson Benge
Tom - Ward's Valet (uncredited)
Lulu Mae Bohrman
Party Guest (uncredited)
Wade Boteler
Head Private Investigator (uncredited)
Ralph Brooks
Party Guest (uncredited)
Francis X. Bushman Jr.
Uniformed Sanitarium Guard (uncredited)
Naomi Childers
Party Guest (uncredited)
Ken Christy
Uniformed Sanitarium Guard (uncredited)
Oliver Cross
Party Guest (uncredited)
Sayre Dearing
Party Guest (uncredited)
Dan Dowling
Party Guest (uncredited)
Jay Eaton
Party Guest Getting Rake (uncredited)
Harry Fleischmann
Taxi Driver (uncredited)
Pat Gleason
Philadelphia Private Investigator (uncredited)
George Golden
Party Guest (uncredited)
Roy Gordon
Sanity Hearing Doctor (uncredited)
Jesse Graves
Bristol's Butler (uncredited)
George Guhl
First Taxi Driver (uncredited)
Stuart Hall
Party Guest (uncredited)
Mahlon Hamilton
Party Guest (uncredited)
Eddie Hart
Detroit Private Investigator (uncredited)
Selmer Jackson
Doctor at Susan's Apartment (uncredited)
Richard Kipling
Party Guest (uncredited)
William Lally
Sanitarium Guard (uncredited)
George Lollier
Lake Placid Private Investigator (uncredited)
George Magrill
Sanitarium Guard (uncredited)
Philo McCullough
Cleveland Private Investigator (uncredited)
Charles McMurphy
Private Investigator (uncredited)
James H. McNamara
Party Guest (uncredited)
James Millican
Miami Private Investigator (uncredited)
Jack Mulhall
Court Clerk (uncredited)
Spec O'Donnell
Anniversary Singer (uncredited)
Broderick O'Farrell
Party Guest (uncredited)
Paul Palmer
Private Investigator (uncredited)
Edward Peil Sr.
Sun Valley Private Investigator (uncredited)
Lee Phelps
Uniformed Sanitarium Guard (uncredited)
James Pierce
San Francisco Private Investigator (uncredited)
Paul Power
Party Guest (uncredited)
Bert Roach
Front Desk Clerk (uncredited)
Ky Robinson
Cincinnati Private Investigator (uncredited)
Byron Shores
Sanity Hearing Doctor (uncredited)
Larry Steers
Party Guest Whose Hat is Floating (uncredited)
Rudolf Steinboeck
Private Investigator (uncredited)
Harry Strang
Police Sgt. Payson (uncredited)
Brick Sullivan
Policeman (uncredited)
William Tannen
Sanitarium Attendant (uncredited)
Edward Van Sloan
Sanity Hearing Doctor (uncredited)
Emmett Vogan
Doctor at Susan's Apartment (uncredited)
Douglas Wood
Sanity Hearing Doctor (uncredited)
Catherine Price
Richard Allen
Private Investigator (uncredited)
William Ludwig
Screenplay
Pandro S. Berman
Producer
David Hertz
Screenplay
Jack Conway
Director
David Hertz
Story
Charles Lederer
Screenplay
William Ludwig
Story
Douglas Shearer
Sound Director
Lennie Hayton
Original Music Composer
William H. Daniels
Director of Photography
Paul Groesse
Assistant Art Director
Ray June
Director of Photography
David Snell
Original Music Composer
Cedric Gibbons
Art Direction
Robert A. Golden
Assistant Director
Jerry Bresler
Unit Manager
Ben Lewis
Editor
Edwin B. Willis
Set Decoration
Douglas Shearer
Recording Supervision