Britain's Prince William waves as he is led by Royal nanny Barbara Barnes from St. Mary's Hospital in Paddington, London, after visiting his mother, Princess Diana and her new baby son, Sept. 16, 1984. (AP Photo)

The Prince and Princess of Wales, Prince Charles and Princess Diana leave St. Mary's Hospital in Paddington, London with their new baby son on Sept. 16, 1984. Princess Diana carries new baby, Prince Harry who was born on Sept. 15. (AP Photo)

Princess Diana carries her new baby, Henry Charles Albert David, with Prince Charles beside her, as they leave London's St. Mary's Hospital on Sept. 16, 1984, just 22 hours after the birth of the infant, who is third in line to the British throne. The three drove to their London home, Kensington Palace. (AP Photo)

This is a 1984 photo of Princess Diana with sons Prince William, foreground, and Prince Harry. (AP Photo)

Princess Diana holds little Prince Williams in the White Drawing Room of Buckingham Palace in London on August 4, 1982 after his christening at the palace in morning on Wednesday. (AP Photo/Pool)

Britain's Prince Charles, Prince of Wales, with his wife Princess Diana, holds his newborn son Prince William as they leave St. Mary's Hospital, Paddington, London, June 22, 1982. (AP Photo/Staff/Redman)

Britain's Prince Charles, Prince of Wales, with his wife Princess Diana,taking their newborn son Prince William, as they left St. Mary's Hospital, Paddington, London, June 22, 1982. (AP Photo/Staff/Redman)

FILE - In this June 22, 1982 file photo Britain's Prince Charles, Prince of Wales, with his wife Princess Diana taking their newborn son Prince William, as they left St. Mary's Hospital, Paddington, London. William, the Duke and and Kate, Duchess of Cambridge are very pleased to announce that the Duchess of Cambridge is expecting a baby, St James's Palace officially announced Monday Dec. 3, 2012. (AP Photo/John Redman, File)