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 Israel prime minister. In the case of Sharon, elections were already due to occur within 100 days of the beginning of his coma; thus, the post-election coalition-building process pre-empted the emergency provisions for the selection of a new prime minister. Nevertheless, Olmert was appointed interim prime minister on 16 April 2006, after the elections, just days before he had formed a government on 4 May 2006, to become the official prime minister. Aside from the position of Acting Prime Minister, there are also Vice Prime Ministers and Deputy Prime Ministers. During his term of office, the prime minister lives in Jerusalem.