Watch full movie online. In the summer of 1980 a shy young girl arrives at Balmoral Castle, two years later that girl becomes a royal Princess. At just 20 years old Lady Diana Spencer married HRH Prince Charles to become HRH Princess Of Wales. From her first steps into the royal world to the birth of her two sons and heirs, this first part tells the story of Diana's early years being part of the most famous family in the world.