Watch Mary Queen of Scots (2018) HD Full Movie Free on SolarMovie. Watch Mary Queen of Scots (2018) online free. Mary Stuart's (Saoirse Ronan's) attempt to overthrow her cousin Elizabeth I (Margot Robbie), Queen o...Mary Stuart's (Saoirse Ronan's) attempt to overthrow her cousin Elizabeth I (Margot Robbie), Queen of England, finds her condemned to years of imprisonment before facing execution.