 Kay KyserHimself | Himself |
 Peter LorreProfessor Karl Fenninger | Professor Karl Fenninger |
 Boris KarloffJudge Spencer Mainwaring | Judge Spencer Mainwaring |
 Bela LugosiPrince Saliano | Prince Saliano |
 Helen ParrishJanis Bellacrest | Janis Bellacrest |
 Dennis O'KeefeChuck Deems | Chuck Deems |
 Alma KrugerAunt Margo Bellacrest | Aunt Margo Bellacrest |
| JJoseph EggentonJurgen | Jurgen |
 Ginny SimmsHerself | Herself |
 Harry BabbittHimself | Himself |
 M.A. BogueIsh Kabibble | Ish Kabibble |
 Sully MasonHimself | Himself |
 Mary BovardMary (uncredited) | Mary (uncredited) |
 Jeff CoreyMr. Corey (uncredited) | Mr. Corey (uncredited) |
 Louise CurrieMarion (uncredited) | Marion (uncredited) |
 Bess FlowersLady In Taxi (uncredited) | Lady In Taxi (uncredited) |
| JJeanne HouserJean (uncredited) | Jean (uncredited) |
| RRichard KiplingScript Man (uncredited) | Script Man (uncredited) |
 Eleanor LawsonMs. Gaby Lawson (uncredited) | Ms. Gaby Lawson (uncredited) |
| LLarry McGrathApartment Complainer (uncredited) | Apartment Complainer (uncredited) |
 Frank MillsCabbie (uncredited) | Cabbie (uncredited) |
| MMimi MontayeMimi (uncredited) | Mimi (uncredited) |
 Dorothy MoorePenny (uncredited) | Penny (uncredited) |
 Leonard MudieReal Karl Fenninger (uncredited) | Real Karl Fenninger (uncredited) |
| JJoseph NorthServant (uncredited) | Servant (uncredited) |
 Frank O'ConnorApartment Responder (uncredited) | Apartment Responder (uncredited) |
| BBeulah ParkingtonMother (uncredited) | Mother (uncredited) |
| JJane PattenJane (uncredited) | Jane (uncredited) |
| EEugenia RafeeFrench Maid (uncredited) | French Maid (uncredited) |
| WWilliam TelaakMac (uncredited) | Mac (uncredited) |
