Happy 31st Birthday Kate Middleton: Style Icon

The beautiful Kate Middleton turns 31 today, so in honor of her big day, let's take a look back at the style icon's greatest looks over the past year. Clearly, the 30s are agreeing with her!

Kate looked perfectly put-together for her first public address in this deep blue coat dress, which she accessorized with a wide black belt, at the official opening of The Treehouse Children's Hospice in March.

Kate Middleton rocked this bright red Alexander McQueen dress at the Diamond Jubilee in June.

Kate's best look so far? The Duchess had fashion critics everywhere swooning over her beautiful teal Jenny Packham gown at the BOA Olympic Concert in May.

Kate proved you don't have to spend a fortune to look great, sporting a printed plaid $55 Hobbs dress during her visit to Bacon's College in July.

Kate showed off her enviably slim figure in a pair of J Brand skinny jeans and matching blue Stuart Weitzman wedges at the Olympic Village in late July.

Kate was all smiles in Tuvalu in this classic cream dress for the Diamond Jubilee tour in September.

Kate paid homage to the ladies in Tuvalu by covering up her Alice by Alice Temperley dress with a grass skirt during the Diamond Jubilee tour in September. 

Kate stunned in this white and gold Alexander McQueen gown, which was embroidered with the hibiscus in order to honor the national flower of Malaysia, during the Diamond Jubilee Tour.

Kate managed to pull off this bright yellow Jaeger shirt dress in the Solomon Islands for the Diamond Jubilee tour in September.

Kate tried an edgier floral look in Singapore for the Diamond Jubilee tour in this Prabal Gurung dress.

Kate's bright green Mulberry dress at the official opening of The Natural History Museum's Treasures Gallery in November was one of her most memorable looks of the year.