Kate Phillips is a British actress. She became famous for her role as Jane Seymour in the successful miniseries Wolf Hall. She subsequently …Kate Phillips is a British actress. She became famous for her role as Jane Seymour in the successful miniseries Wolf Hall. She subsequently appeared in the miniseries War & Peace, first season of the television series The Crown, and last three seasons of the television series Peaky Blinders. In 2019 she appeared as Princess Mary in the film Downton Abbey.