Heir to a Balkan throne, Prince Nicholai falls in love with an American vocalist who is touring with an operetta company in Europe. When he makes known his intention to renounce his heritage and marry Mary Lou, his mother has him locked up and orders Mary Lou back to the United States.
| Actor | Role |
|---|---|
 J. Harold MurrayPrince Nicholai | Prince Nicholai |
 Norma TerrisMary Lou Hopkins / Mitzi Hofman | Mary Lou Hopkins / Mitzi Hofman |
 Walter CatlettJoe Glitner | Joe Glitner |
| IIrene PalastyAnnushka | Annushka |
| LLennox PawleKing Alexander | King Alexander |
 Tom PatricolaMahai | Mahai |
 Evelyn HallQueen Louise | Queen Louise |
 Paul RalliNamari | Namari |
 Herman BingGerman Director | German Director |
 Wallace FordMitzi's Fan (uncredited) | Mitzi's Fan (uncredited) |