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 Poland programme outlining the government's agenda to the Sejm, requiring a vote of confidence. Conflicts stemming from both interest and powers have arisen between the offices of President and Prime Minister in the past. The current and seventeenth Prime Minister is Mateusz Morawiecki of the Law and Justice party. Morawiecki replaced incumbent premier Beata Szydło, who resigned on 7 December 2017. Near the end of the First World War, an assortment of groups contested to proclaim an independent Polish state. In early November 1918, a socialist provisional government under Ignacy Daszyński declared independence, while a separate committee in Kraków claimed to