1932 film
Rasputin and the Empress is a 1932 American pre-Code film directed by Richard Boleslawski and written by Charles MacArthur. Produced by Metro-Goldwyn-Mayer (MGM), the film is set in Imperial Russia and stars the Barrymore siblings (John, as Prince Chegodieff; Ethel, as Czarina Alexandra; and Lionel Barrymore, as Grigori Rasputin). It is the only film in which all three siblings appear together.
The film's inaccurate portrayal of Prince Felix Yusupov and his wife Princess Irina (renamed "Prince Chegodieff" and "Princess Natasha") resulted in a historically significant lawsuit against MGM and gave rise to the "all persons fictitious disclaimer", which has since become standard in Hollywood works of fiction.
Plot summary adapted from Wikipedia, licensed under CC BY-SA 4.0.