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
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2. Model Rachael Finch does flowers and colourful stripes