It's been fun!
But everyone has to say goodbye sometimes!
The lil' guy was wearing a super cute red sweater, and was reached out towards Australia as Kate Middleton carried him onto the Royal Australian Air Force aircraft to transfer to an international commercial flight for London.
We're sure the little guy slept on the plane afterwards because he's had such a long trip - yes he has!
But an amazing one at that!
Check out some pictures from the perfect royal family's departure day right (below)!!!
[Image via BauerGriffinOnline.]