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 Sri Lanka new elections could be held to elect a new president. This was the case with H.E. President Dingiri Banda Wijetunge. United National Party leaders Dudley Senanayake and Ranil Wickramasinghe together with Sri Lanka Freedom Party leader Sirimavo Bandaranaike was appointed three times to the position. With the passing of the 19th amendment to the constitution in 2015, the prime minister was granted more powers when appointing ministers and leading the cabinet. On the 26th October 2018, former President Mahinda Rajapaksa was appointed by Maithripala Sirisena as the Prime Minister dismissing incumbent Prime Minister Ranil Wickremasinghe. Wickremasinghe refused to accept the