"Two parallel stories, the first is that of King Edward VIII, who abdicated in order to marry American Wallis Simpson. The second, and today, is that of a married woman, obsessed with the character of Simpson and lives a torrid affair with a Russian security guard "1 2
- Annabelle Wallis as Arabella Green.
- Abbie Cornish as Wally Winthrop.
- Natalie Dormer as Elizabeth Bowes-Lyon.
- Andrea Riseborough as Wallis Simpson.
- James D'Arcy as King Edward VIII.
- James Fox as Jorge V.
- Katie McGrath as Lady Thelma Furness.
- Laurence Fox as Bertie.
- Oscar Isaac as Evgeni.
- Richard Coyle as William.
- David Harbour as Ernest.