Matthew Guinness (born 6 June 1940) is an English actor. He played the part of the Farmer in the 1976 film Nuts in May, appears in Ridley Scott's The Duellists (1977) and had a small role in 1987's Lady Jane. He has also worked extensively in theatre.
Guinness was born in London, the only child of actor Alec Guinness (1914–2000) and Merula Salaman (1914–2000). According to his father, Guinness was afflicted with polio early in his life, although he later made a full recovery.