Kate and Wills touched down in Oz in the early hours before heading to the iconic Sydney Opera House and Sydney Harbour Bridge for a meet and greet the Aussie public.
Turning heads as usual, Kate looked simply stunning in a bright yellow Roksanda Ilincic dress with white panels, which she coordinated with nude courts and a matching clutch.
But although we loved her outfit, it seems Prince William wasn't so keen!
According to reports, Kate told onlookers that William thought she "looked like a banana". Cheeky!
The Duke and Duchess of Cambridge, Kate and William, spent last week with their baby son George in New Zealand.
While there, George made some new friends at a babies' playgroup and Kate and Wills went head-to-head in a yacht race.
After arriving in Australia, George was whisked off with his nanny across the harbour to their accommodation. Following the reception, Kate and William also boarded a boat and sailed off to reunite with their son.
William had previously told dignitaries: "I don't think I could finish these brief words to you without mentioning one other family member, George, who is now busy forging his own link with Australia.
"Catherine and I were very grateful for the many kind messages and gifts from across the country that we received when George was born.
"I suspect George's first word might be 'Bilby' [an Australian marsupial] – only because 'Koala' is harder to say. We really look forward to our time here together as a family."
Kate and William will spent two weeks in Australia and, among their commitments, will visit residents affected by last year's bush fires in the Blue Mountains.
They will also travel up to the Northern Territory and spend time at Uluru - Ayers Rock.