Richard Walter John Montagu Douglas Scott, 10th Duke of Buccleuch and 12th Duke of Queensberry KBE, DL (born 14 February 1954) is the Duke of Buccleuch and Queensberry, as well as Chief of Clan Scott. He is the senior patrilinear descendant of Sir James Scott, 1st Duke of Monmouth (9 April 1649 – 15 July 1685), the eldest son of King Charles II and his mistress, Lucy Walter.
Richard Scott was born in 1954, the son of John Scott, Earl of Dalkeith (later 9th Duke of Buccleuch) and his wife, Jane (née McNeill), and was baptised with Princess Margaret as one of his godparents.
He attended Eton, was Page of Honour to the Queen Mother from 1967 to 1969. In 1973 his father inherited the Dukedoms of Buccleuch and Queensberry, and Scott took the courtesy title of Earl of Dalkeith. He graduated from Christ Church, Oxford in 1976 with a Bachelor of Arts.
In 1981 he married Lady Elizabeth Marian Frances Kerr, a daughter of the 12th Marquess of Lothian (and a sister of the 13th Marquess of Lothian, better known as the Conservative politician Michael Ancram), and they later had four children:
• Lady Louisa Jane Therese Montagu Douglas Scott (b. 1 October 1982)
• Walter John Francis Montagu Douglas Scott, Earl of Dalkeith (b. 2 August 1984)
• Lord Charles David Peter Montagu Douglas Scott (b. 20 April 1987)
• Lady Amabel Clare Alice Montagu Douglas Scott (b. 23 June 1992).
On 4 September 2007 he inherited the titles Duke of Buccleuch and Duke of Queensberry upon his father's death.
The family seats are Bowhill House, three miles outside Selkirk, representing the Scott line; Drumlanrig Castle in Dumfries and Galloway, representing the Douglas line; and Boughton House in Northamptonshire, England, representing the Montagu line. These three houses are still lived in by the family and are also open to the public. The family also owns Dalkeith Palace in Midlothian, which is let, and has owned several other country houses and castles in the past.
The art collection of the Dukes of Buccleuch is of great significance; thus the recovery of the stolen Leonardo da Vinci painting Madonna of the Yarnwinder (see graphic) from the collection, valued at 30 million GBP, in a raid on the offices of a prestigious law firm captured public attention in 2007. A discovery in June 2008 of a painting in the family collection at Boughton House, a rare portrait of the young Elizabeth I Queen of England, was welcomed by art historians..