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 Spain as taken by Prime Minister Zapatero on his first term in office on 17 April, 2004 was: In 2008, from the time the king nominated José Luis Rodríguez Zapatero for a second term as Prime Minister immediately following the 2008 general election, almost a month passed before Zapatero was able to present his Investiture Speech before the Congress and stand for a Vote of Confidence. If no overall majority was obtained on the first Vote of the Confidence, then the same nominee and program is resubmitted for a second vote within forty-eight hours. Following the second vote, if confidence by