Julia Eileen Gillard AC (born 29 September 1961) is a retired Australian politician who served as the 27th Prime Minister of Australia and Leader of the Australian Labor Party from 2010 to 2013. She was previously the 13th Deputy Prime Minister of Australia from 2007 until 2010 and held the cabinet positions of Minister for Education, Minister for Employment and Workplace Relations and Minister for Social Inclusion from 2007 to 2010. She was the first and to date only woman to hold the positions of Deputy Prime Minister, Prime Minister and leader of a major party in Australia.

What's the best answer to this question: has australia ever had a female prime minister?
yes