It's as much about the frocks and hats-that-look-like-anything-but-hats as it is about the racing, and this year is no exception.
2015 sees a favouring of brights, candy stripes and painterly florals. Here's the first crop of our favourite looks from the field.
1. Jennifer Hawkins pairs fluoro with black
2. Model Rachael Finch does flowers and colourful stripes