The royal tour is winding to a close, and today we saw two show-stopping outfits on our favorite Duchess. In the morning and early afternoon, Kate wore a blindingly bright green coatdress by Princess Diana's favorite designer, Catherine Walker. If William thought her Erdem coat was bright, we're dying to know what he thought of this one!

The royal couple spend the morning of their last full day of the tour with children, planting a tree and going to a playground.

The Duke And Duchess Of Cambridge Tour Australia And New Zealand - Day 18
They then went to a reception with the Australian Prime Minister, where William spoke and gushed about their trip. Kate reportedly admitted to a guest at the reception that she was sweltering in her coat - not surprising!

For an evening reception the Duchess donned a white peplum cocktail dress by Lela Rose. She wore her hair up in an elegant updo, and looked every bit the Princess (even if we were hoping for a bit more sparkle). She accessorized with black pumps and the diamond bracelet given to her by Prince Charles.

Click through the gallery above to see more photos of Kate and William's 18th day of the tour.