Evelyn Laye
— Madame Irela (Maggie O'Neil)
Fritz Kortner
— Arthur Kober
Emlyn Williams
— George Leary
Carl Esmond
— Count Ehrenburg / Archduke Theodore
Alice Delysia
— Madame Valmond
Conchita Supervia
— Baba L'Etoile
Muriel Aked
— Tremlowe
Dennis Val Norton
— Sovino
Browning Mummery
— Solo Tenor / Alfredo the Gondolier
Frederick Leister
— Emperor FranzJosef
Alec Guinness
— W.W.I. soldier in concert audience (uncredited)
George Treger
— Solo gypsy violinist
Neville Brook
— Minor Role