A historic change will be made to the opening lines of Australia's national anthem taking effect from today, in a move recognising 60,000 years of indigenous history. Prime Minister Scott Morrison will on Friday announce a simple change to the second line of Advance Australia Fair to be "we are one and free", instead of "young and free". It will be the first change to Advance Australia Fair's lyrics since 1984, the same year it became the national anthem under the Hawke Government. The surprise move is intended to acknowledge Australia's First Nations people, with the word "young" neglecting the country's ancient Aboriginal heritage.