Jane Seymour as Wallis Simpson

Olivia de Havilland as Aunt Bessie Merryman

Tom Wilkinson as Ernest Simpson

Anthony Andrews as Prince of Wales / Edward VIII

Lucy Gutteridge as Thelma

Robert Hardy as Winston Churchill

Julie Harris as Alice

Phyllis Calvert as Queen Mary

Richenda Carey as Maud Kerr-Smiley

Susan Denaker as Connie Thaw

Rupert Frazer as Lord Perry Brownlow

Peter Graves as Lord Reith

Evelyn Laye as Lady Cunard

Charlotte Mitchell as Lady Chatfield

David Waller as Stanley Baldwin

Mona Bruce as Mrs. Baldwin

Elizabeth Counsell as Katherine Rogers

John Horsley as Justice Sir John Hawke

Helen Horton as Martha

Vincent Marzello as Benny Thaw

Claire Parker as Rosemary

William Roberts as Herman Rogers

Margaretta Scott as Lady Wigram

Amanda Walker as Betty Lawson-Johnson

Paul Williamson as Inspector Evans