Credit: Pascal Le Segretain/Getty Images

Haute headgear!

While the world waits with baited breath to see bride-to-be Kate Middleton's wedding gown, the royal wedding guests are certainly turning heads with a collection of stunning fascinators.

Princesses Beatrice, 22, and Eugenie, 21, cousins to Prince William and Prince Harry and daughters of Prince Andrew and Sarah Ferguson, chose Philip Treacy toppers to accessorize their outfits Friday at Westminster Abbey.

A popular London milliner who specializes in fascinators, Treacy's work has been seen in Sex and the City. Middleton is rumored to be such a big fan, that she's commissioned him to create the headpieces that her bridesmaids will wear today. Victoria Beckham chose a midnight blue Treacy creation for the ceremony.

As for Beatrice and Eugenie, the sisters say their styles couldn't be more different.

"Beatrice loves her glamorous dresses and her hair being curly or big -- like Mummy's -- and I hate volume. I like my hair to be sort of flat," Eugenie tells The Telegraph. "I like just throwing on a pair of jeans and generally being more understated. She is more 'Let's do the glamour.' We're chalk and cheese."

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