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 Andrew Shaver David Rizzio Guest Star Ann Pirvu Nicole Guest Star Nick Slater Prince Henri Guest Star Tyrone Savage Lord Hamilton Guest Star Steve Byers Archduke Ferdinand Guest Star Megan Hutchings Jane Guest Star Claire Hunter Emily Knox 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 Dawn Wilkinson Director John J. Sakmar Writer Kerry Lenhart Writer