With a small royal wave from inside the Australian Air Force jet on the tarmac in Canberra, the Duke and Duchess of Cambridge bid Australia farewell after a 10-day tour across the country.
Departing from the airport in Fairbairn just after 2pm, the couple had spent the day commemorating Anzac Day, including a surprise visit at the dawn service at the Australian War Memorial in Canberra.
Earlier, the pair had walked solemnly past the Pool of Reflection with an entourage including Governor-General Peter Cosgrove and his wife Lynne, pausing for a moment before entering the tomb of the Unknown Australian Soldier.
Three FA-18 hornets flew overhead just before they entered the memorial and the duchess leaned over to whisper to Sir Peter.
Kate wore a grey tweed coat dress, midnight blue headpiece, and a poppy broach that Emma, the wife of Australian Victorian Cross recipient Ben Roberts-Smith, gave her at a reception in Canberra on Thursday night.
Inside the Hall of Memory, artificial lights were brought in as the sun struggled to eek through the stained glass windows in the cavernous space where the Tomb of the Unknown Soldier lies. It was in here that they laid a floral tribute of native flowers, gently placing small posies of rosemary and Australian natives including Kangaroo Paw on the verge of the tomb, which was scattered with poppies.
Silently they stood on the grave before solemnly, and in unison, bowing their heads. It was an intimate moment as they paid their respects.
As a cold wind blew through the War Memorial, the Duke and Duchess of Cambridge then planted an Aleppo Pine sapling derived from seeds gathered after the battle of Lone Pine.
For Prince William, who served in Britain's Royal Air Force for more than seven years, planting a lone tree had a special family connection.
Prince Henry, the Duke of Gloucester – who later went on to serve as Australia's governor-general after the Second World War – planted the original lone pine at the war memorial in October 1934.
That tree which is coming to the end of its natural life, was propagated from a pine cone from Gallipoli, which Australian Lance Corporal Benjamin Smith, sent home to his mother, Jane McMullin.
Back at the airport, a screaming Prince George bounced in his mother's arms as the young family boarded the plane back to Britain. After the 10-day journey that took the royals from Sydney to Uluru, the couple farewelled the "Lucky Country".