News Kate Middleton, Happy 31st Birthday! Love, InStyle By Sharon Clott Kanter Published on January 9, 2013 Pin Share Tweet Email Photo: Dominic Lipinski/Getty; James Whatling/Splash News; Mark Cuthbert/UK Press/ABACAUSA.COM; David Crump/AFP/Getty; Chris Jackson/Getty It's one of the best days of the year—Kate Middleton’s birthday! The Duchess of Cambridge turns 31 today, and this year is going to be more special than ever. Not only is she happily married to a Real Prince (oh, hey William) and owns one of the best wardrobes in the world (filled with Alexander McQueen, Alice Temperley, and Jenny Packham galore!), she'll also become a mom when she delivers her first child this spring. So, let's all wish a big, big, big, happy birthday to Catherine today—may this year bring her (and us, by proxy) even more happiness! Plus, see Kate's most memorable outfits ever! You'll love these pictures. MORE:• Kate Middleton's Pregnancy Style• Kate is #2 Most Searched Person in the World• Kate and Diana's Similar Style Was this page helpful? Thanks for your feedback! Tell us why! Other Submit