The Fabulous Hats of Will and Kate's Royal Wedding

Sophie Countess of Wessex, Prince Edward's wife, stayed neutral in a beige Bruce Oldfield dress and coat with a rosette spray from Jane Taylor perched on the side of her blonde hair. Next to her is Prince Anne, the younger sister of Prince Charles, who dons a purple topper.

The singer leaves her hippie chic style behind, picking a classic wide-brim hat with embellishments to match her red sheath and cropped jacket.

Crown Princess Victoria of Sweden wears an elegant wide-brimmed, peach hat

Miss Charlene Wittstock, fiancee of Prince Albert of Monaco, arrives in a classic, white wide-brimmed hat.

The Mother of the bride, Carole Middleton pairs her sky blue silk dress and matching passementerie coat by Catherine Walker (one of Princess Diana's favorites) with a matching hat by Berkshire based milliner Jane Corbett.

Miriam Gonzalez Durantez of Spain opts for a over-sized, floral fascinator.

Frances Osborne, wife of the Chancellor of the Exchequer George Osborne, arrives with a small pillbox hat embellished with feathers of various size and color. 

Zara Phillips dons a black, large brim straw number, with ruffled flower effect by Philip Treacy.

Tara Palmer-Tomkinson  wows in blue and tops off her Deborah Milner off-the-shoulder dress and matching Nicholas Kirkwood shoes with a rosette-topped fascinator by Philip Treacy.

Queen Margrethe II of Denmark arrives in a teal, feathered cap.

Camilla, Duchess of Cornwall wears a airy, tan Philip Treacy design and an Anna Valentine dress.

Sophie Winkleman arrives in a black, wide brimmed, oval-shaped number.

The grandmother of the groom – and England's reigning monarch – shows her happy side in an all-yellow design by her personal assistant Angela Kelly.

Victoria Beckham wears a satin Philip Treacy pillbox with long crystal embellishments.

Princess Eugenie of York opts for a pale pink Philip Treacy design, while her sister, Princess Beatrice of York wore a blue, feather and dragonfly adorned headpiece.

The Royal Wedding wouldn't be complete without an extravagant hat or two, and the guests of William and Kate's Wedding did not disappoint. Browse our picture gallery for the very best of the Mad Hattery in attendance.