Cast principale
Laura La Plante
Olga 'The Midnight Sun' Morova
Pat O'Malley
Grand Duke Sergius of Russia
Michael Vavitch
Duke's Adjutant
Raymond Keane
Alexei Orloff - Russian Officer
Earl Metcalfe
Nicolai Orloff
George Siegmann
Ivan Kusmin - Banker
Arthur Hoyt
Yessky - Kusmin's Secretary
Medea Radzina
Anisya - Olga's Companion