1 / 14

Pippa Middleton may best be known for her jaw dropping Maid of Honor dress at sister Kate Middleton's wedding, or as a doting aunt to the Duchess of Cambridge's three royal children (Prince George, Princess Charlotte, and Prince Louis). But now, she's a first-time mother herself. Middleton wed husband James Matthews last year in London, and the couple just welcomed a baby boy on October 15. Here, we take a look at all of the new mom's best maternity looks from the past nine months. Plus, read all of the details about the new baby, and see how the royal family is reacting to the happy news.