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
Nicholas Soussanin
— Duke's Aide
Cesare Gravina
— Opera Director
Nina Romano
— Barbara
Albert Prisco
— Messenger
George B. Williams
— Ruined Banker
Yola d'Avril
Max Barwyn
— Maitre D'
Sayre Dearing
— Young Russian Officer
Louis Mercier
— Russian Dissident
Phillips Smalley
— Card Player