Grenville, William (1759-1834), was a British prime minister. He was prime minister in the government that passed the act abolishing the slave trade in 1807. Grenville's government contained so many leading politicians that it was called the Ministry of All the Talents. Grenville first became a member of Parliament in 1782. The next year, he joined the government of his cousin William Pitt the Younger. In 1790, while home secretary, Grenville was created a peer. He became prime minister after the death of Pitt in 1806, and resigned in 1807. His father, George Grenville, had been prime minister from 1763 to 1765.