Charles Spencer, 3rd Duke of MarlboroughKG, PC (22 November 1706 – 20 October 1758), known as The Earl of Sunderland between 1729 and 1733, was a Britishsoldier and politician. He briefly served as Lord Privy Seal in 1755. He led British forces during the Raid on St Malo in 1758.
Charles inherited the Sunderland title from his older brother in 1729, becoming 5th Earl of Sunderland, and then the Marlborough title from his aunt, Henrietta, 2nd Duchess of Marlborough in 1733.
He was one of the original governors of London's Foundling Hospital, the foundation of which in 1739 marked a watershed in British child care advocacy and attitudes.