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 Australia attendant. The official residences are fully staffed and catered for both the Prime Minister and their family. In addition, both have extensive security facilities. These residences are regularly used for official entertaining, such as receptions for Australian of the Year finalists. The Prime Minister receives a number of transport amenities for official business. The Royal Australian Air Force's No. 34 Squadron transports the Prime Minister within Australia and overseas by specially converted Boeing Business Jets and smaller Challenger aircraft. The aircraft contain secure communications equipment as well as an office, conference room and sleeping compartments. The call-sign for the aircraft