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 (as S.Z. 'Cuddles' Sakall) Betta St. John Princess Johanna John Williams Lutz Evelyn Varden Queen John Hoyt Prime Minister Richard Anderson Lucas Mario Lanza Prince Karl (singing voice)