Cromwell is a 1970 British historical drama film written and directed by Ken Hughes. It is based on the life of Oliver Cromwell, who rose to lead the Parliamentary forces during the later years of the English Civil War and, as Lord Protector, ruled Great Britain and Ireland in the 1650s. It features an ensemble cast, led by Richard Harris as Cromwell and Alec Guinness as King Charles I, with Robert Morley as Edward Montagu, 2nd Earl of Manchester and Timothy Dalton as Prince Rupert of the Rhine.

Robert Adolph Wilton Morley CBE was an English actor who enjoyed a lengthy career in both Britain and the United States. He was frequently cast as a pompous English gentleman representing the Establishment, often in supporting roles. In 1939 he received an Academy Award nomination for Best Supporting Actor for his portrayal of King Louis XVI in Marie Antoinette.