A prince has a romance with a barmaid before he must give up personal happiness for duty.
| Actor | Role |
|---|---|
 Ann BlythKathie Ruder | Kathie Ruder |
 Edmund PurdomPrince Karl Franz | Prince Karl Franz |
 John EricsonCount Von Asterburg | Count Von Asterburg |
 Louis CalhernKing of Karlsberg | King of Karlsberg |
 Edmund GwennProf. Juttner | Prof. Juttner |
 S.Z. SakallJoseph Ruder | Joseph Ruder |
 Betta St. JohnPrincess Johanna | Princess Johanna |
 John WilliamsLutz | Lutz |
 Evelyn VardenQueen | Queen |
 John HoytPrime Minister | Prime Minister |
 Richard AndersonLucas | Lucas |
 Mario LanzaPrince Karl (singing voice) | Prince Karl (singing voice) |
 Steve RowlandFeuerwald | Feuerwald |