Philip Treacy is an Irish milliner who has spurred the ever-growing national obsession with hats of the British Royals. His creations often include extravagant elements, like fake butterflies, flowers, feathers, and more.

If you’ve watched the wedding of Prince William and Kate Middleton on TV, you might have noticed some of the guests, like Princess Eugenie and Beatrice, as well as celebrities like Victoria Beckham wearing his hats. In total, 36 guests at the wedding wore Treacy’s hats!

Sometimes, his hats are classic and elegant, like the guests at the wedding above.

From left to right; Victoria Beckham, Princess Beatrice, Tara Palmer-Tomkinson

I personally thought Victoria Beckham’s hat by Philip Treacy was the best at the wedding, because it was relatively neat and went along with her outfit…

Sometimes, the hats are a bit over the top and tacky, like the one worn by Princess Beatrice. There has been a lot of debate and criticism over Princess Beatrice’s hat, since worn at the wedding. So, what do you think of her hat?

Other guests at the Royal Wedding added Philip Treacy’s hat, like the woman above who tops her head-to-toe blue look with a fancy hat.

Lady Gaga poses with Philip Treacy, left

Lady Gaga is a huge fan of Treacy’s hats. She reportedly applied for internship with the milliner! She has worn his hats in numerous events, in red carpet appearances, concerts, and etc.

Lady Gaga in her Scorpion Hat

Lady Gaga in Philip Treacy's Telephone Hat

Lady Gaga at the Grammys 2010

Sarah Jessica Parker At a Premiere

I think it’s even hard to categorize his creations as “hats”. They completely break our conception of hats, since by definition, hats are “a shaped covering for the head worn for warmth, as a fashion item, or as part of a uniform.” It’s better to categorize them as a piece of “art” or “creation”. Take a look at some of his other masterpieces!

The Glove Hat

Attack of the Butterflies!

This looks like something from Star Wars!