Answer
In 1974, Margaret Rutherford played Princess Dragomiroff in Murder on the Orient Express, a film directed by Sidney Lumet. The film was based on the 1934 Agatha Christie novel of the same name. Princess Dragomiroff is a wealthy Russian aristocrat who is traveling on the Orient Express when it is stopped by a snowdrift. She is one of the suspects in the murder of a wealthy American businessman.