Alexander Douglas Douglas-Hamilton, 16th Duke of Hamilton, 13th Duke of Brandon (born 31 March 1978), styled Marquess of Douglas and Clydesdale until 2010, is a Scottish nobleman and the premier peer of Scotland.

Douglas-Hamilton was born in Edinburgh,[1] the son of Angus Douglas-Hamilton, 15th Duke of Hamilton, and his first wife, Sarah Scott, and was educated at Keil School, Dumbarton, and Gordonstoun in Scotland.

He also inherited other Scottish peerages and titles, Marquess of Douglas, Marquess of Clydesdale, Earl of Angus, Earl of Lanark, Earl of Arran and Cambridge, Lord Abernethy and Jedburgh Forest, Lord Machanshyre and Polmont and Lord Aven and Innerdale, and the Barony of Dutton in the peerage of Great Britain.

[2] In this role, he walks immediately before the monarch in the ancient ceremonial procession known as the Riding of Parliament.

On 7 May 2011, he married Sophie Ann Rutherford (born 8 December 1976) in Edinburgh.