John Derek as Prince Roland

Barbara Rush as Countess Nita Orde

Carla Balenda as Princess Maria

Whitfield Connor as King Stephan

Edgar Barrier as Count Blanco

Robert Shayne as Prime Minister Treeg

Harry Lauter as Jan

Don C. Harvey as Koepke (as Don Harvey)

Henry Rowland as Greb

Britt Lomond as Brenner (as Glase Lohman)

Gene Roth as Captain Brock

Bob Peoples as Carl

Sandy Sanders as Meyers

Joe McGuinn as General DuBois (as Joseph F. McGuinn)

Al Cantor as Lund

Edward Colmans as Spanish Admiral

Stanley Blystone as Captain Brock's First Mate (uncredited)

James Dime as Pirate (uncredited)

Eddie Foster as Sailor (uncredited)

John Hart as Captain of the Guards (uncredited)