Katharine Hepburn
Constance Dane Roberti
Charles Boyer
Franz Roberti
John Beal
Johnny Lawrence
Jean Hersholt
Professor Thalma
Sam Hardy
Marx
Inez Courtney
Miss Wilson
Helene Millard
Sylvia DeWitt
Ferdinand Gottschalk
Enrico Pazzini
Susan Fleming
Elise
Lee Kohlmar
Schubert
Jean Howard
Didi Smith-Lennox
Anne Grey
Lady Phyllis Cameron
Lowden Adams
Albert Henderson (uncredited)
Gino Corrado
Messenger (uncredited)
Jay Eaton
Man in Hotel (uncredited)
Dick Elliott
Max - Florist (uncredited)
Sam Hayes
Radio Announcer (uncredited)
Eddie Kane
Mr. Lubin (uncredited)
Cornelius Keefe
Bill (uncredited)
Ray Mayer
Song Promoter at Music Publisher (uncredited)
Torben Meyer
Ritz Headwaiter (uncredited)
Bert Moorhouse
Party Guest / Theatergoer (uncredited)
Edmund Mortimer
New Year's Eve Celebrant (uncredited)
Broderick O'Farrell
Concertgoer (uncredited)
Inez Palange
Violin Student's Mother (uncredited)
Jack Rice
New Year's Eve Celebrant (uncredited)
Jason Robards Sr.
Ticket-Seller (uncredited)
Adrian Rosley
Bierbauer (uncredited)
Alexander Schoenberg
(uncredited)
Larry Steers
New Year's Eve Celebrant (uncredited)
Michael Visaroff
Bassoonist (uncredited)
Stanhope Wheatcroft
Ticket Purchaser (uncredited)
Harry Wilson
Stagehand (uncredited)
Florence Wix
Concertgoer (uncredited)
George Webb
(uncredited)
Philip Moeller
Director
Sarah Y. Mason
Screenplay
Victor Heerman
Screenplay
Anthony Veiller
Screenplay
Lester Cohen
Story
Mel Berns
Makeup Artist
Pandro S. Berman
Producer
Robert De Grasse
Director of Photography
William Hamilton
Editor
Van Nest Polglase
Art Direction
Bernard Newman
Costume Design
Jane Murfin
Continuity
Carroll Clark
Assistant Art Director
John E. Tribby
Recording Supervision
Philip Faulkner Jr.
Recording Supervision
C. J. White
Production Manager
Elizabeth McGaffey
Researcher
Newton House
Stand In
Charles Darwin
Stand In
Max Steiner
Music Director
Jane Loring
Assistant Director