The royal family made their last appearance at a ceremony commemorating ANZAC (Australian and New Zealand Army Corps) Day, a special day of remembrance.
Prince William and Kate were later seen visiting the Australian War Memorial in the nation's capital, where they planted a tree in the memorial garden.
The royal duo also laid a wreath, which featured a handwritten note from William: "Never forget those who have paid the ultimate sacrifice for our freedom."
And before boarding their plane, the family of three waved to the crowd and thanked everyone for such a warm trip to Australia and New Zealand.
A spokesperson for Kensington Palace told E! News, "The tour of New Zealand and Australia has been an incredible experience for both The Duke and Duchess and the couple really have enjoyed it immensely."
It continued, "We always said this would be an opportunity for the Duke to introduce both countries to the Duchess and Prince George and the couple have been bowled over by the extraordinarily warm welcome shown to them as a family by people everywhere they went."
Between Middleton's sensational fashions throughout the weeks-long trip, or Prince George's most adorable moments, the family's voyage was definitely one for the history books.
Check out a recap of the best moments from their journey!