You probably didn't find out about this part of royal family history in your World History class. BritBox has announced an upcoming four-part drama called The Lady with three cast members top-lining. Today, Mia McKenna-Bruce (How To Have Sex), Natalie Dormer (Game of Thrones), and Ed Speleers (Star Trek: Picard) have been cast in the miniseries. McKenna-Bruce will take on the role of Jane Andrews, a former royal aide, who in real life was convicted of murder. Dormer will play Sarah Ferguson, Duchess of York, and Speleers will play Andrews's lover, Thomas Cressman. Other members of the cast include: Philip Glenister, Claire Skinner, Laura Aikman, Ophelia Lovibond, Mark Stanley, Daniel Ryan, and Sean Teale.