Adelaide Kane Queen Mary Actor Megan Follows Queen Catherine Actor Rachel Skarsten Queen Elizabeth Actor Celina Sinden Greer Actor Craig Parker Narcisse Actor Rose Williams Princess Claude Actor Ben Geurens Gideon Blackburn Actor Dan Jeannotte James Actor Jonathan Goad John Knox Actor Spencer MacPherson King Charles Actor Will Kemp Lord Darnley Actor Anastasia Phillips Queen Leeza Guest Star Lewis Kirk Duke Martel de Guise Guest Star Stewart Arnott Earl of Clan Gordon Guest Star Nola Augustson Lady Lennox Guest Star Laurie McCarthy Executive Producer Frank Siracusa Executive Producer John Weber Executive Producer Brad Silberling Executive Producer Gretchen J. Berg Executive Producer Aaron Harberts Executive Producer Stuart Gillard Director Wendy Riss Writer Drew Lindo Writer