The Pitt–Newcastle ministry governed the Kingdom of Great Britain between 1757 and 1762, at the height of the Seven Years' War. It was headed by Thomas Pelham-Holles, 1st Duke of Newcastle, who was serving in his second term as Prime Minister. The most influential and famous figure in the government however was William Pitt, who served as Secretary of State.
The ministry ended a period of political instability, when Britain had struggled in the war. Pitt was a strong war leader, but lacked the support in parliament necessary to provide effective leadership. Newcastle provided this, as he has a strong base of support in the House of Commons. They divided duties between them: Pitt directed defence and foreign policy, while Newcastle controlled the nation's finances and patronage.
The ministry was very successful leading Britain to many victories in the war, particularly in the so-called Annus Mirabilis of 1759, which put the country in an immensely strong position by 1761. That year Pitt resigned over a dispute concerning the entry of Spain into the war. The ministry had been under pressure since the death of the old King with the accession of King George III, who disliked both Pitt and Newcastle and favoured John Stuart, 3rd Earl of Bute. Bute had joined the Cabinet as Northern Secretary in March 1761, and following Pitt's resignation the ministry was sometimes referred to as the Bute–Newcastle coalition.
In 1762 Newcastle was forced to resign, with his followers (the "Pelhamites") sacked by Bute in the "Massacre of the Pelhamite Innocents"; this is traditionally considered to have been the moment the ministry collapsed.
It is unclear who was member of the ministry.