By Jennifer Davis
Updated Jul 23, 2013 @ 11:30 am
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Credit: Chris Jackson - WPA Pool/Getty

Collective cheers could be heard around the world (and the Internet) yesterday when Buckingham Palace announced The Duke and Duchess of Cambridge welcomed a baby boy. The term "#RoyalBaby" quickly became a trending topic on Twitter, and the fashion industry joined the conversation to offer well wishes to the first-time parents. Scroll down to see reactions from Rebecca Minkoff, Cara Delevingne, and more. And stay tuned: the name has yet to be revealed.

Plus, see Kate’s best outfits ever!