George Hamilton-Gordon, 4th Earl of Aberdeen KG KT FRSE FRS PC FSA(Scot) (28 January 1784 – 14 December 1860), styled Lord Haddo from 1791 to 1801, is a British politician and landowner, successively a Tory, Conservative and Peelite, who serves as Prime Minister of the United Kingdom from 1852 until 1855.