Sir Michael Murray Hordern (3 October 1911 – 2 May 1995) was an English actor. He was knighted in 1983 for his services to the theatre, which began before the Second World War.
Hordern was born in The Poplars, an 18th century townhouse in Berkhamsted, Hertfordshire, the son of Margaret Emily (Murray) and Capt. Edward Joseph Calverly Hordern. He was educated at Brighton College, as was his brother Peter. He acted at school and then as an amateur with the St Pancras People's Theatre. He worked as a school teacher and travelling salesman before entering the profession. In 1937, he made his professional stage debut at the People's Palace, East London, playing a minor role in Othello and, later in the year, joined the repertory company of the Little Theatre in Bristol. There he met the actress Grace Eveline Mortimer; they married in 1943 and remained together until her death in 1986. They had one daughter, Joanna.
During World War II Horden served on HMS Illustrious (R87), in Operation Ironclad in 1942 and later as a Lt.-Commander in the office of the first Sea Lord. After the war he has a brief appearance in the 1960 film Sink the Bismarck! as Admiral Tovey, Commander-in-Chief, HMS King George V (41).