William Lamb, 2nd Viscount Melbourne, (15 March 1779 - 24 November 1848), was a British Whig politician who served as Home Secretary (1830-1834) and Prime Minister (1834 and 1835-1841). His first premiership ended when he was dismissed by King William IV in 1834, the last British prime minister to be dismissed by a monarch. Five months later he was re-appointed and served for six more years, into the reign of Queen Victoria. He is best known for coaching the Queen in the ways of politics, acting almost as her private secretary.