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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, it's time for her to become a mother herself. Middleton wed husband James Matthews last year in London, and the couple are expecting their first child in the fall. Here, we're charting all of the mom-to-be's best looks as she prepares for baby number one.