William and Kate, The Duke and Duchess of Cambridge, stepped out to the Absolute Return for Kids (ARK) 10th Anniversary Gala dinner tonight in London --  and, with the exception of her wedding day, we've never seen her look more glamorous!

Wearing a gorgeous, Swarovski crystal embellished pink gown from Jenny Packham's Spring Summer 2011 collection, the oh-so-skinny Middleton was all smiles as she and her tuxedo-wearing Prince arrived to the dinner.

The event is their first appearance at an evening gala as a married couple.

According to the Daily Mail, tickets to the annual children's charity benefit are pricey -- with guests shelling out over $16,000 for a ticket or over $81,000 for a table of 10.

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