Rural Australian Nellie Melba becomes an opera star in 1900s Europe and the United States.
| Actor | Role |
|---|---|
| PPatrice MunselNellie Melba | Nellie Melba |
 Robert MorleyOscar Hammerstein I | Oscar Hammerstein I |
 John McCallumCharles Armstrong | Charles Armstrong |
 John JustinEric Walton | Eric Walton |
| AAlec ClunesCesar Carlton | Cesar Carlton |
 Martita HuntMme. Marchesi | Mme. Marchesi |
 Sybil ThorndikeQueen Victoria | Queen Victoria |
 Joseph TomeltyThomas Mitchell | Thomas Mitchell |
 Beatrice VarleyAunt Catherine | Aunt Catherine |
 Violetta ElvinPrima Ballerina | Prima Ballerina |
| CCecile ChevreauAnnette | Annette |
 Theodore BikelPaul Brotha | Paul Brotha |
| CCharles CraigMan (uncredited) | Man (uncredited) |
 Marcel PoncinRoger (uncredited) | Roger (uncredited) |
 Robert RiettiItalian Policeman (uncredited) | Italian Policeman (uncredited) |
 Bill ShineMan (uncredited) | Man (uncredited) |
| DDorit WellesAdelina Patti (uncredited) | Adelina Patti (uncredited) |