Nelson EddyPrince Peter Karagin, aka Peter Teranda Ilona MasseyLydia Marakova Charles RugglesNicki Popoff Frank MorganIvan Danchenoff Lionel AtwillProfessor Marakov C. Aubrey SmithGeneral Karagin Dalies FrantzDimitri Marakov Phillip TerryLieutenant Smirnoff Walter Woolf KingMichael Sibirsky Frederick WorlockRamensky Abner BibermanLeo Proplinski Arthur W. CernitzSergei Pavloff Roland VarnoLieutenant Nikitin Willy CastelloCapt. Testoff Paul IrvingPrince Morodin Mildred ShayJeanette Sibirsky Alma KrugerMrs. Danchenoff Zeffie TilburyNatalya Petrovna Demetrius Alexis(uncredited) Dorothy AtesCafe Girl (uncredited) Douglas BeattieBaritone (uncredited) Charles BrokawSoldier (uncredited) Rand BrooksCrying Soldier (uncredited) Feodor Chaliapin Jr.Soldier (uncredited) Irene ColemanCafe Girl (uncredited) Alexis Davidoff(uncredited) Dick DennisSinger (uncredited) Al FergusonSinger (uncredited) Jack GeorgeViolinist (uncredited) Boris Glagolin(uncredited) Charles JudelsBatoff (uncredited) David Laughlin(uncredited) Sigurd NilssenSultan (uncredited) Lee PhelpsDoorman (uncredited) Frank PugliaIvan (uncredited) Constantine Romanoff(uncredited) William Royle(uncredited) Hector V. Sarno(uncredited) Earl SeamanSoldier (uncredited) Marla Shelton(uncredited) Florence ShirleyLily Allison (uncredited) Robert R. Stephenson(uncredited) Kay SuttonGirl (uncredited) Andrew TombesWilbur Allison (uncredited) Monte VandergriftCorporal (uncredited) Ellinor Vanderveer(uncredited) Ernö VerebesDanchenoff's Secretary (uncredited) George VolkSoldier (uncredited) Marjorie WoodworthRussian Girl (uncredited) Reinhold SchünzelDirector Charles BennettScreenplay Lawrence WeingartenProducer Cedric GibbonsArt Direction Edwin B. WillisSet Decoration Joseph RuttenbergDirector Of Photography Karl FreundDirector Of Photography Herbert StothartOriginal Music Composer Eric MaschwitzTheatre Play 
