Jackie St Clair wore an actual birdcage with lavender flowers atop her head.
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Photo: Getty
Adhering closely to the theme of the event, one guest rocked a painted horse on her hat.
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Photo: Getty
One attendee wore a magical pink and purple butterfly headpiece.
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Photo: Getty
A guest went all-blush with a (very) oversized pink rose headpiece.
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Photo: Getty
Another guest went for larger-than-life florals.
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Photo: Getty
Meghan Markle donned a cream Givenchy dess and Philip Treacy hat.
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Photo: Getty
Princess Anne opted for a traditional cream jacket and matching hat.
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Photo: Getty
Princess Beatrice wore a periwinkle Juliette Botterill hat, and Princess Eugenie sported a white Emily London hat.
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Photo: Getty
Queen Elizabeth II was sunny in a yellow topper, with accents of blue flowers.
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Photo: Getty
Sophie, Countess of Wessex looked elegant in a light purple with black mesh detailing.
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Photo: Getty
Camilla, Duchess of Cornwall went for an off-white coat and matching hat.
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Photo: Getty
The Tootsie Rollers varied in rainbow patterns and vibrant headpieces.
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Photo: Getty
One spectator wore a detailed peacock headpiece.
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Photo: Getty
One guest channeled Georgia O'Keefe vibes in an oversized watercolor flower hat.
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Photo: Getty
Nazer Bullen paired her floral dress and playful flower hat.
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Photo: Getty
Lacry Puravu went for a full red lace look.
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Photo: Getty
Angelina Kali donned a muted blue and cream floral headpiece.
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Photo: Getty
One attendee wore a unique dark feather hat.
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Photo: Getty
A bouquet came to life in this white and pink headpiece.
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Photo: Getty
One guest accented her navy hijab with a beautiful feather and gemstone bow.
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Photo: Getty
A smiling guest paired her red lace dress with a pointed headpiece.
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Photo: getty
One attendee took "flower crown" to a new level.
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Photo: Getty
Women enjoyed the festivities in various headgear.
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Photo: Getty
A guest wearing a bright orange budding flower hat looked on from the crowd.
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Photo: Getty
An attendee sported an oversized black floppy hat, accessorized with orange to compliment her dress.
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Photo: Getty
One woman paired her black and white dress with a matching mesh headpiece.
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Photo: Getty