Charles Spencer, 3rd Duke of Marlborough

His Grace The Duke of Marlborough KG PC
Portrait by Joshua Reynolds c. 1759
Lord Privy Seal
In office 8 June 1755 – 22 December 1755
Monarch	George II
Prime Minister	The Duke of Newcastle
Preceded by	The Earl Gower
Succeeded by	The Earl Gower
Lord Steward of the Household
In office 1749–1755
Monarch	George II
Prime Minister	Henry Pelham The Duke of Newcastle
Preceded by	The Duke of Devonshire
Succeeded by	The Duke of Rutland
Personal details
Born	22 November 1706
Died	20 October 1758(1758-10-20) (aged 51)
Spouse	Elizabeth Trevor
Children	Lady Diana Beauclerk Elizabeth Herbert, Countess of Pembroke and Montgomery George Spencer, 4th Duke of Marlborough Lord Charles Spencer Lord Robert Spencer
Parents	Charles Spencer, 3rd Earl of Sunderland Lady Anne Churchill
Military service
Allegiance	Great Britain
Branch/service	British Army
Battles/wars	Seven Years' War

Charles Spencer, 3rd Duke of Marlborough, KG, PC (22 November 1706 – 20 October 1758), styled as The Honourable Charles Spencer between 1706 and 1729 and as the Earl of Sunderland between 1729 and 1733, was a British Army officer, politician and peer who served as Lord Privy Seal in 1755. He led the British forces involved in the raid on St Malo in 1758.