Clémence Poésy

as Mary Queen of Scotts

Robert Carlyle

as King James I

Catherine McCormack

as Elizabeth I of England

Michael Fassbender

as Guy Fawkes

Richard Coyle

as Catesby

Paul Nicholls

as Lord Darnley

Gary Lewis

as John Knox

Tim McInnerny

as Cecil

Emilia Fox

as Lady Margaret

Richard Harrington

as Thomas Percy