Julia Eileen Gillard is an Australian former politician who served as the 27th prime minister of Australia from 2010 to 2013. She held office as leader of the Australian Labor Party (ALP), having previously served as the 13th deputy prime minister of Australia from 2007 to 2010, under Prime Minister Kevin Rudd. She is the first and only woman to hold either office in Australian history.

The deputy prime minister of Australia is the deputy chief executive and the second highest ranking officer of the Australian Government. The office of deputy prime minister was officially created as a ministerial portfolio in 1968, although the title had been used informally for many years previously. The deputy prime minister is appointed by the governor-general on the advice of the prime minister. When Australia has a Labor government, the deputy leader of the parliamentary party holds the position of deputy prime minister. When Australia has a Coalition government, the Coalition Agreement mandates that all Coalition members support the leader of the Liberal Party becoming prime minister and the leader of the National Party becoming the deputy prime minister.