Sydney is turning it turning blue and white today in honour of the Fleet Review this weekend.
Prince Harry has even arrived in Sydney to help celebrate 100 years since the Royal Australian Navy fleet first entered the waterways.
The Sydney Opera House will be lit up and the harbour will display the biggest fireworks display since the Sydney 2000 Olympics!
Some amazing Navy inspiration.....
It's going to be brilliant - DRM and I are off to join in these celebrations and I am all dressed in my blue and white outfit for a fun day!