Vienna-born Elisabeth Bergner, in her first English-language film, is radiant as the obscure German princess who would become the most powerful woman in Russian history. Hers is an excellent performance in a difficult role, where it would have been easy to be upstaged by the other, flashier, characters. As Grand Duke Peter - later Czar Peter III - Douglas Fairbanks Jr. behaves like a homicidal Hamlet, all moodiness & flares of deadly temper. He makes an interesting effort to create a charmer out of a pathetic man who was obviously a maniac.