Kate Middleton and Prince William excited the world when they announced in September that they were expecting their third child . For more than a month, people patiently waited for the Duchess of Cambridge to make her first appearance in public since sharing the news — mainly because her maternity fashion style is so enviable and her elegance and poise is such a relief in a world where public figures hurl nicknames at each other online — and on Tuesday, they finally got their wish.