Ann Blyth
— Kathie Ruder
Edmund Purdom
— Prince Karl Franz
John Ericson
— Count Von Asterburg
Louis Calhern
— King of Karlsberg
Edmund Gwenn
— Prof. Juttner
S.Z. Sakall
— Joseph Ruder
Betta St. John
— Princess Johanna
John Williams
— Lutz
Evelyn Varden
— Queen
John Hoyt
— Prime Minister
Richard Anderson
— Lucas
Mario Lanza
— Prince Karl (singing voice)
Steve Rowland
— Feuerwald