Hélène Yorke (born Heléne Ann Dyk) is a Canadian actress, singer, and dancer.
She is known for her work on Broadway for originating the roles of Olive Neal in Bullets Over Broadway and Evelyn Williams in American Psycho, as well as for playing Glinda in Wicked on tour.
Additionally, Yorke is known for her work on television, playing the role of Jane Martin on the Showtime American period drama television series Masters of Sex, Olivia Graves on Graves, and Amy Breslin on The Good Fight.
Yorke has worked on various Broadway productions, including Bullets Over Broadway, American Psycho, and Grease. She also played Glinda in Wicked on tour.
In 2013, Yorke was cast in a recurring role as Jane Martin on Masters of Sex.