 Katharine HepburnConstance Dane Roberti | Constance Dane Roberti |
 Charles BoyerFranz Roberti | Franz Roberti |
 John BealJohnny Lawrence | Johnny Lawrence |
 Jean HersholtProfessor Thalma | Professor Thalma |
 Sam HardyMarx | Marx |
 Inez CourtneyMiss Wilson | Miss Wilson |
 Helene MillardSylvia DeWitt | Sylvia DeWitt |
 Ferdinand GottschalkEnrico Pazzini | Enrico Pazzini |
 Susan FlemingElise | Elise |
 Lee KohlmarSchubert | Schubert |
 Jean HowardDidi Smith-Lennox | Didi Smith-Lennox |
 Anne GreyLady Phyllis Cameron | Lady Phyllis Cameron |
| LLowden AdamsAlbert Henderson (uncredited) | Albert Henderson (uncredited) |
 Gino CorradoMessenger (uncredited) | Messenger (uncredited) |
 Jay EatonMan in Hotel (uncredited) | Man in Hotel (uncredited) |
 Dick ElliottMax - Florist (uncredited) | Max - Florist (uncredited) |
 Sam HayesRadio Announcer (uncredited) | Radio Announcer (uncredited) |
 Eddie KaneMr. Lubin (uncredited) | Mr. Lubin (uncredited) |
 Cornelius KeefeBill (uncredited) | Bill (uncredited) |
| RRay MayerSong Promoter at Music Publisher (uncredited) | Song Promoter at Music Publisher (uncredited) |
 Torben MeyerRitz Headwaiter (uncredited) | Ritz Headwaiter (uncredited) |
 Bert MoorhouseParty Guest / Theatergoer (uncredited) | Party Guest / Theatergoer (uncredited) |
| EEdmund MortimerNew Year's Eve Celebrant (uncredited) | New Year's Eve Celebrant (uncredited) |
 Broderick O'FarrellConcertgoer (uncredited) | Concertgoer (uncredited) |
 Inez PalangeViolin Student's Mother (uncredited) | Violin Student's Mother (uncredited) |
 Jack RiceNew Year's Eve Celebrant (uncredited) | New Year's Eve Celebrant (uncredited) |
 Jason Robards Sr.Ticket-Seller (uncredited) | Ticket-Seller (uncredited) |
| AAdrian RosleyBierbauer (uncredited) | Bierbauer (uncredited) |
| AAlexander Schoenberg(uncredited) | (uncredited) |
 Larry SteersNew Year's Eve Celebrant (uncredited) | New Year's Eve Celebrant (uncredited) |
