Samir Hussein/WireImageWhen it comes to a day at the royal ascot, hats are always the star of the show.
Earlier today, Kate Middleton joined Queen Elizabeth II and Prince William for day one of the Royal Ascot at Ascot Racecourse.
While royal watchers loved the Duchess of Cambridge's Ellie Saab dress with long sleeves, many eyes went straight to the hat that couldn't be missed.
E! News has learned Philip Treacy was the designer behind the floral accessory that complemented her look perfectly.
Despite the rain, thousands of racegoers were treated to the sight of senior royals processing in carriages along the famous Berkshire course to mark the start of the event. In fact, the only immediate family members missing with Prince Harry and Meghan Markle who were looking after their six-week-old baby Archie.
The Royal Ascot is as much a social and fashion occasion as it is a sporting event. From summer dresses to sharp suits, everyone looks their best. But perhaps the greatest piece of fashion around the event is the hats.
Take a look at just some of the wild and creative looks from the royal ascot in our gallery below.
You didn't think the Queen would disappoint, did you? The royal family member looked elegant in an Angela Kelly outfit and hat with a Canadian Northern Star diamond brooch.
From the gloves and sunglasses to the extravagant hat, this attendee knows how to accessorize in style.
Talk about a show stopper! Green and pink have never looked better together.
Sometimes, one hat just isn't enough when completing your look.
Despite the rainy forecast, this attendee chose the perfect hat for summer that can easily block those sunrays.
No matter what your favorite flower is, you'll find something to love about this attendee's hat.
When it comes to hats at the royal ascot, bigger is always better.
With a hat like this, you're sure to be noticed from the moment you arrive.
How high can you go in the hat department?!
The fashion designer has never looked better in head-to-toe mint green.
Red hot! The jazz singer is hitting all the right notes in the fashion department.
Don't forget royal watchers! We're only at day one of the festivities. In other words, more hats to come!