Washington, Feb. 27 -- Oscar-nominated 'Conclave' star Isabella Rossellini has joined the cast of the upcoming Wallis Simpson biopic.

Rossellini will play Suzanne Blum in John Gore Studios' 'The Bitter End' (working title) opposite Joan Collins, who plays Simpson.

Blum is a formidable French lawyer and confidante of Simpson, who, at Blum's hands, found herself snared in a grip of obsession and coercive control, Deadline reported.

Wallis, Duchess of Windsor, was the wife of Prince Edward, Duke of Windsor (former King Edward VIII).

Rossellini said, "I am absolutely thrilled to join the incomparable Joan Collins and the brilliant Mike Newell in bringing this extraordinary story back to life. Louise Fennell's script allows us to delve int...