Prime Minister of Australia prime minister, otherwise William McMahon63. Robert Menzies was the oldest person to ever be prime minister, leaving office at 71 years old. The longest-serving Prime Minister was Sir Robert Menzies, who served in office twice: from 26 April 1939 to 28 August 1941, and again from 19 December 1949 to 26 January 1966. In total Robert Menzies spent 18 years, 5 months and 12 days in office. He served under the United Australia Party and the Liberal Party respectively. The shortest-serving Prime Minister was Frank Forde, who was appointed to the position on 6 July 1945 after the death of
Prime Minister of Mauritius the party/alliance that wins an election. The current Prime Minister of Mauritius, Pravind Jugnauth, leader of the MSM, was appointed by the President on 23 January 2017 following the resignation of coalition leader Sir Anerood Jugnauth who held the post following victory of his Alliance in the 2014 General Election. The official residence of the Prime Minister during his term in office is the Clarisse House, the Prime Minister's Office is located in Port Louis. The longest serving prime minister is Anerood Jugnauth who held the office for 18 years as Prime Minister. The current Prime Minister's portfolio includes, inter-alia,