St. James's Palace released this statement following her visit to the hospital:
"Their Royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting a baby. The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall and Prince Harry and members of both families are delighted with the news."
Image: Duke & Duchess of Cambridge (Prince William and Kate Middleton) leaving Westminster Abbey following their royal wedding. April 29, 2011 London, UK Picture: Paul Smith / Featureflash, via Shutterstock