Racegoers don their most obscure headgear. Photo / Getty
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
3. A race-goer in painterly florals
4. Bold blooms meet dark accents
5. Presenter Emma Freedman is a lady in red
6. Actress Lauren Phillips opts for soft salmon
7. Tartan, florals, pompoms and studs make the mix for model Ashley Hart
8. Britain's Bachelorette Sasha Mielczarek in a kooky print and crown
9. Equestrian eventer Georgia Connolly stuns in pink
10. It's candy-pink lace for model Nikki Phillips
Five of our favourite, gravity defying fascinators.
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NY Times: It blocks harmful UV rays but still lets enough sunlight through for benefits.