The Mad Hatters: Royal Wedding of the Duke and Duchess of Cambridge

Besides than the dress Catherine, Duchess of Cambridge wore, another eye ctacher during the Royal Wedding are the hats. Also known as the fascinator, the accesory is essential for formal weddings and specific request has been put in the invitation card to wear one.

The grandmother, The Queen

The groom's stepmother, Camilla Duchess of Corwall

The bride's mother, Carole Middleton

The groom's aunt, Princess Anne

The groom's other aunt, Sophie, Countess of Wessex

The groom's cousin, Zara Phillips

The groom's other cousins, Princess Beatrice and Princess Eugene

A neigbouring ruler, Queen of Denmark

One of the groom's relative, Princess Michael of Kent

The heir to her throne, Crown Princess Victoria of Sweeden (with his fitness trainer hubby, Prince Daniel)

A member of the Royal Family, Lady Frederick of Windsor

Princess Marie Chantal Miller of Greece

Princess Letizia of Spain

Princess Mathilde of Belgium

Wife of British Deputy PM, Miriam Gonzalez

Socialite, Tara Palmer Tomkinson

Prince Harry's current squeeze, millionaire daughter, Chelsy Davy

And even the Becks, both David and Victoria looked dapper in their top hat and fascinator!