King Charles has confirmed that it is up to the Australian people to decide whether the country remains a constitutional monarchy or becomes a republic.

Axar.az reports that ahead of the King's visit to Australia next week, the Australian Republic Movement exchanged letters with Buckingham Palace officials, writing on the King's behalf.

Correspondence from the palace, revealed by the Daily Mail, says that "whether Australia becomes a republic" is a "matter for the Australian public to decide".

The future of the monarchy in Australia is likely to be an issue during the royal visit by King Charles and Queen Camilla, which includes events in Sydney and Canberra.

The letter sent by palace officials restates the existing position, rather than marking any new change in policy - and Buckingham Palace is not saying anything further to the letter's contents.

But it is an amicable exchange, following a request by a group campaigning for a republic to have a meeting with the King during his visit.

"The King appreciated that you took the time to write and asked me to reply on his behalf," says the letter from Buckingham Palace to the Australian Republic Movement, written in March.

"Please be assured that your views on this matter have been noted very carefully.

"His Majesty, as a constitutional monarch, acts on the advice of his Ministers, and whether Australia becomes a republic is therefore a matter for the Australian public to decide."

The letter adds that the King and Queen have a "deep love and affection" for Australia and "your thoughtfulness in writing as you did is warmly appreciated".