Mary Queen of Scots is a 2018 historical drama film directed by Josie Rourke and with a screenplay by Beau Willimon based on John Guy's 2004 biography Queen of Scots: The True Life of Mary Stuart. The film stars Saoirse Ronan as Mary, Queen of Scots, and Margot Robbie as her cousin, the English monarch, Queen Elizabeth I. Jack Lowden, Joe Alwyn, David Tennant, and Guy Pearce also star in supporting roles.