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 Iraq Prime Minister of Iraq The Prime Minister of Iraq is the head of government of Iraq. The Prime Minister was originally an appointed office, subsidiary to the head of state, and the nominal leader of the Iraqi parliament. Under the newly adopted constitution the Prime Minister is the country's active executive authority. Nouri al-Maliki (formerly Jawad al-Maliki) was selected to be Prime Minister on 21 April 2006. On 14 August 2014, al-Maliki agreed to step down as prime minister of Iraq to allow Haider al-Abadi to take his place. On 25 October 2018, Adil Abdul-Mahdi was sworn into office five