James Ramsay MacDonald (né James McDonald Ramsay; 12 October 1866 – 9 November 1937) was a British statesman and politician who served as Prime Minister of the United Kingdom. The first two of his governments belonged to the Labour Party, where he led a minority Labour government for nine months in 1924 and again between 1929 and 1931. In 1931, MacDonald was expelled from the Labour Party, after he formed a National Government dominated by the Conservative Party and supported by only a few Labour members, his premiership of which lasted until 1935.
MacDonald, along with Keir Hardie and Arthur Henderson, was one of the three principal founders of the Labour Party in 1900.