Yes,yes,you're right!The man
is not the "historical " de Custine,but he inspired the character very much.And as said Daniel,it doesn't really matter...
About the characters,here is the list of actors(it come from the official site):
Sergey Dreiden as a STRANGER
Maria Kuznetsova as CATHERINE THE GREAT
Leonid Mozgovoy as THE SPY
Mikhail Piotrovsky as Himself
David Giorgobiani as ORBELI
Alexander Chaban as BORIS PIOTROVSKY
Lev Yeliseyev as Himself
Oleg Khmelnitsky as Himself
Alla Osipenko as Herself
Artem Strelnikov as a talented boy
Tamara Kurenkova as Herself
Maxim Sergeyev as PETER THE GREAT
Natalia Nikulenko as CATHERINE THE FIRST
Yelena Rufanova as the first lady
Yelena Spiridonova as the second lady
Yuliy Zhurin as NICHOLAS I
Svetlana Svirko as ALEXANDRA FEDOROVNA, A SPOUSE OF NICHOLAS I
Kostantin Anisimov as the First Cavalier
Alexey Barabash as the Second Cavalier
Ilia Shakunov as the Third Cavalier
Alexander Kulikov as the Fourth Cavalier
Anna Aleksahina as ALEXANDRA FYODOROVNA, A SPOUSE OF NICHOLASII
Vladimir Baranov as NICHOLAS II
Valentin Bukin as a Military Official
Svetlana Gaitan as a Custodian at The Museum
Vadim Guschin as a Grandee of Catherine The Great
Kiril Dateshidze as a Master of Ceremonies
Michael Dorofeyev as the First Card Player
Valentina Yegorenkova as a Maid of Honour of Catherine The Great
Oleg Losev as a Court Official
Vadim Lobanov as a Chamberlain
Vladimir Lisetsky as a Court Minister
Alexander Malnykin as a Batman of Peter The Great
Kirill Miller as a Court official
Victor Mikhailov as a Court Official
Sergey Muchenikov as a Museum Official
Sergey Nadporozhsky as a Court Official
Yuri Orlov as a Grandee of Catherine The Great
Alexander Razbash as a Museum Official
Vladimir Sevastyanikhin as an Under-tutor of the Heir
Svetlana Smirnova as a Widow
Boris Smolkin as CHANCELLOR NESSELRODE
Yevgeny Filatov as the Second Card-player
Jury Khomutyansky as an Insane Italian
Anatoly Shvedersky as a Marshal