The royal couple - and George - are starting a super busy tour of Australia that will take them to many parts of Sydney, as well as to Brisbane, Uluru, Adelaide and Canberra in 10 days.
The royal party arrives in the country after completing a packed tour of New Zealand that saw them visit six cities in 10 days.
After touching down in Sydney, the royals' first stop will be the Opera House.
The party will then travel across the harbour to Admiralty House where they'll stay as guests of new Governor-General Sir Peter Cosgrove.
Next day they'll travel to the Blue Mountains to meet bushfire-affected families.
The region, west of Sydney, is still recovering after major bushfires last October.
"I think ultimately this (visit) is something that will please the community because what it says is that the world hasn't forgotten what happened in October 2013," Blue Mountains mayor Mark Greenhill told AAP.
"It means long after the smoke has cleared people still remember and I think that is very important."
During their time in Sydney, the royal party is also due to visit the Royal Easter Show at Homebush, attend Bear Cottage children's hospice in Manly, and take in a surf life saving display on Manly beach.
Bear Cottage's nursing unit manager Narelle Martin said the royal visit would be a "memorable memory" for the centre's sick kids and their families.
"Part of Bear Cottage is about creating happy memories for children whose lives are shortened, and this is certainly going to create a very happy memory for those families," Ms Martin, told AAP.
After a brief trip to Queensland, the couple will return to Sydney to make a stop at Taronga Zoo and its bilby enclosure - named after Prince George as part of the nation's gift after his birth.
The couple will then visit Uluru, leaving Prince George with his nanny in Canberra, before heading to Adelaide followed by a final stop in Canberra for Anzac Day.
The tour comes 30 years since Prince Charles and Diana, Princess of Wales, visited Australia and New Zealand for six weeks with William when he was Prince George's age.
The trip, which will be the duchess's first official visit to Australia, follows Prince William's last official visit in March 2011 to Queensland and Victoria.
