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)

Joan Barclay

Telephone Operator (uncredited)

Wade Boteler

Head Private Investigator (uncredited)

Francis X. Bushman Jr.

Uniformed Sanitarium Guard (uncredited)

Naomi Childers

Party Guest (uncredited)

Sayre Dearing

Party Guest (uncredited)

Jay Eaton

Party Guest Getting Rake (uncredited)

Pat Gleason

Philadelphia Private Investigator (uncredited)

Roy Gordon

Sanity Hearing Doctor (uncredited)

Jesse Graves

Bristol's Butler (uncredited)

George Guhl

First Taxi Driver (uncredited)

Mahlon Hamilton

Party Guest (uncredited)

Selmer Jackson

Doctor at Susan's Apartment (uncredited)

George Magrill

Sanitarium Guard (uncredited)

Philo McCullough

Cleveland Private Investigator (uncredited)

James Millican

Miami Private Investigator (uncredited)

Jack Mulhall

Court Clerk (uncredited)

Spec O'Donnell

Anniversary Singer (uncredited)

Broderick O'Farrell

Party Guest (uncredited)

Edward Peil Sr.

Sun Valley Private Investigator (uncredited)

Lee Phelps

Uniformed Sanitarium Guard (uncredited)

James Pierce

San Francisco Private Investigator (uncredited)

Bert Roach

Front Desk Clerk (uncredited)

Larry Steers

Party Guest Whose Hat is Floating (uncredited)

Harry Strang

Police Sgt. Payson (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)