Possible Clues:

• Daughter of Tsar Nicholas II once rumoured to have escaped execution
• Princess of Bolton
• 'Cinderella' stepsister
• Russian royal as depicted in film, missing capital
• Oscar role for Ingrid Bergman
• Daughter of Tsar Nicholas II, believed to have been executed by the Bolsheviks in 1918
• Ingrid Bergman film of '56
• 1997 voice role for Meg Ryan
• Christian shown by James to be obsessed with her
• Bergman's 1956 Oscar-winning role