Kate, Prince William and their newborn son posed for dozens of photographers and camera crews outside the hospital's private Lindo Wing before they headed home with the baby nestled securely in a car seat. Hundreds of people had also gathered outside the hospital for a glimpse of Kate, William and their newborn son. The Duchess of Cambridge returned home to Kensington Palace on Monday evening, barely 12 hours after entering St Mary's hospital to have her third child.