Abbie Cornish as Wally Winthrop

Andrea Riseborough as Wallis Simpson

James D'Arcy as Edward

Oscar Isaac as Evgeni

Richard Coyle as William Winthrop

David Harbour as Ernest

James Fox as King George V

Judy Parfitt as Queen Mary

Haluk Bilginer as Al Fayed

Geoffrey Palmer as Stanley Baldwin

Natalie Dormer as Elizabeth

Laurence Fox as Bertie

Douglas Reith as Lord Brownlow

Katie McGrath as Lady Thelma

Christina Chong as Tenten

Annabelle Wallis as Arabella Green

Liberty Ross as Connie Thaw

Penny Downie as Dr. Vargas

Suzanne Bertish as Lady Cunard

Ben Willbond as Equerry

Leigh Zimmerman as East Side Woman

Linda Glick as Woman Getting Taxi

Gil Cohen-Alloro as Hotel Clerk

Stephen Jones as Royal Milliner

James McNeill as Sotheby's Staffer

Vincent Montuel as Waiter

Jay Alexander as Security Guard (uncredited)

Catherine Balavage as Woman