Robert James Lee (Bob) Hawke, AC (born 9 December 1929) was the 23rd Prime Minister of Australia and longest serving Australian Labor Party Prime Minister.After a decade as president of the Australian Council of Trade Unions, he entered politics at the 1980 election and became Prime Minister within three years. He became by far the longest-serving and most electorally successful Labor Prime Minister, achieving the rare feat of winning four consecutive federal elections, and he is Australia's third longest-serving Prime Minister.