The government of Great Britain was under the joint leadership of William Pitt the Elder and William Cavendish, 4th Duke of Devonshire from November 1756 to 1757. Following Pitt's dismissal, a new ministry was formed in July 1757 under Pitt and Thomas Pelham-Holles, 1st Duke of Newcastle.
The principal ministers of the Crown were as follows:
References
Pitt–Devonshire ministry Wikipedia(Text) CC BY-SA