A European princess jeopardizes her crown when she falls for an American millionaire.
| Actor | Role |
|---|---|
 Sophia LorenPrincess Olympia | Princess Olympia |
 Maurice ChevalierPrince Philip | Prince Philip |
 John GavinCharles Foster | Charles Foster |
 Angela LansburyCountess Lina | Countess Lina |
| IIsabel JeansPrincess Eugénie | Princess Eugénie |
 Tullio CarminatiAlbert | Albert |
 Milly VitaleCan-Can Girl | Can-Can Girl |
 Carlo HintermannPrince Ruprecht | Prince Ruprecht |
 Roberto RissoAide de camp | Aide de camp |
 Friedrich von LedeburCount Sandor | Count Sandor |
 Adrienne GessnerAmelia | Amelia |
 Luigi CimaraNot listed | Not listed |
| WWaveney LeeCountess Theresa | Countess Theresa |
| WWalter VarndalNot listed | Not listed |