Diana, Princess of Wales, was the first wife of Charles, Prince of Wales. Their sons, Princes William and Henry (Harry), are second and third in line to the thrones of the United Kingdom and 15 other Commonwealth Realms. A public figure from the announcement of her engagement to Prince Charles, Diana remained the focus of near-constant media scrutiny in the United Kingdom and around the world up to and during her marriage, and after her subsequent divorce. Her sudden death in a car accident was followed by a spontaneous and prolonged show of public mourning throughout the United Kingdom, and to a lesser extent, worldwide.