Derek John Penrose (5 May 1914 â 22 May 1983) was a British actor. After graduating from RADA in 1936, he made his London stage debut the following year in Old Music at the St. James' Theatre.
His best-known role was in the 1949 film Kind Hearts and Coronets, where he played Lionel, Sibella's dull husband whom Louis was accused of murdering.