The dress was worn by Joely Richardson, who starred in the 2005 television production Wallis and Edward.

BBC: Wallis Simpson dress

Madonna has cast James Fox and his son Laurence Fox in her film about Edward VIII's wife, Wallis Simpson.

BBC: Madonna casts Fox family for Wallis Simpson film

In 1937, the Duke of Windsor, who had abdicated as King Edward VIII of England, married Wallis Simpson in France.

CNN: Tuesday,

But the fate of Lilibet, as she was known to her friends, changed when her uncle Edward abdicated the thone to marry Wallis Simpson, an American divorcee.

CNN: Queen Elizabeth celebrates 60 years on throne

The Queen Mother was a person who symbolised service... she sustained this country and the royal family when King Edward VIII was forced to abdicate over his relationship with twice-married Wallis Simpson.

CNN: Amanpour, Quest: Britain's lament