Andrew Robert Buxton Cavendish, 11th Duke of Devonshire, (born January 2, 1920), 11th Duke of Devonshire, is the present Duke. He held the courtesy title of Marquess of Hartington from 1948 to 1950. He served as a minister in Harold Macmillan's government, and he received the Military Cross in 1944. He married Deborah Mitford (born March 31, 1920), sister to Nancy Mitford and Jessica Mitford. He lives at Chatsworth, the ancestral home.

The 11th Duke's son and heir, Peregrine Andrew Morny Cavendish, Marquess of Hartington, (born April 27, 1944), married Amanda Heywood-Lonsdale (born 1944) and lives at Bolton Abbey.

Lord Hartington's son and heir is William Cavendish, Earl of Burlington (born 1969).

Preceded by:
Edward Cavendish
Duke of Devonshire Followed by:
Current Incumbent