William Cavendish, 4th Duke of Devonshire

His Grace The Duke of Devonshire
Prime Minister of Great Britain
In office 16 November 1756 – 25 June 1757
Preceded by	The Duke of Newcastle upon Tyne
Succeeded by	The Duke of Newcastle upon Tyne
Personal details
Born	baptised 1 June 1720
Died	2 October 1764(1764-10-02) (aged 44) Spa, Belgium
Political party	n/a (Whig)

William Cavendish, 4th Duke of Devonshire, KG, PC (bapt. 1 June 1720 - 2 October 1764) was a British Whig statesman who was Prime Minister of Great Britain for a short period of time.

Titles from birth to death

• Lord Cavendish of Hardwick (1720-1729)
• Marquess of Hartington (1729-1741)
• Marquess of Hartington, MP (1741-1751)
• The Rt. Hon. Marquess of Hartington (1751-1755)
• His Grace The Duke of Devonshire, PC (1755-1756)
• His Grace The Duke of Devonshire, KG, PC (1756-1764)