Katharine Hepburn
Role: Constance Dane Roberti
Charles Boyer
Role: Franz Roberti
John Beal
Role: Johnny Lawrence
Jean Hersholt
Role: Professor Thalma
Inez Courtney
Role: Miss Wilson
Helene Millard
Role: Sylvia DeWitt
Ferdinand Gottschalk
Role: Enrico Pazzini
Lee Kohlmar
Role: Schubert
Jean Howard
Role: Didi Smith-Lennox
Anne Grey
Role: Lady Phyllis Cameron
Lowden Adams
Role: Albert Henderson (uncredited)
Gino Corrado
Role: Messenger (uncredited)
Jay Eaton
Role: Man in Hotel (uncredited)
Dick Elliott
Role: Max - Florist (uncredited)
Sam Hayes
Role: Radio Announcer (uncredited)
Eddie Kane
Role: Mr. Lubin (uncredited)
Cornelius Keefe
Role: Bill (uncredited)
Ray Mayer
Role: Song Promoter at Music Publisher (uncredited)
Torben Meyer
Role: Ritz Headwaiter (uncredited)
Bert Moorhouse
Role: Party Guest / Theatergoer (uncredited)
Edmund Mortimer
Role: New Year's Eve Celebrant (uncredited)
Broderick O'Farrell
Role: Concertgoer (uncredited)
Inez Palange
Role: Violin Student's Mother (uncredited)
Jack Rice
Role: New Year's Eve Celebrant (uncredited)
Jason Robards Sr.
Role: Ticket-Seller (uncredited)
Adrian Rosley
Role: Bierbauer (uncredited)
Alexander Schoenberg
Role: (uncredited)
Larry Steers
Role: New Year's Eve Celebrant (uncredited)
Michael Visaroff
Role: Bassoonist (uncredited)
Stanhope Wheatcroft
Role: Ticket Purchaser (uncredited)
Harry Wilson
Role: Stagehand (uncredited)
Florence Wix
Role: Concertgoer (uncredited)
George Webb
Role: (uncredited)