PHOTOS: Princess Diana's 23 Sweetest Mom Moments

(Reuters)

Britain's Prince William, the 6-month old son of British Prince Charles and Princess Diana, during a special picture call at Kensington Palace in London. (Associated Press)

Prince Charles and Princess Diana arrive with Prince William in Alice Springs, Australia. (Reuters)

Diana, Princess of Wales is seen arriving at a memorial service with her sons William (L) and Harry during the 50th anniversary of the Blitz of London. (Reuters)

The Princess of Wales hugs her eldest son Prince William, aged 10, after boarding the Royal Yacht Britannia. (Associated Press)

Princess Diana of Wales leans along the railing of the tour boat Maid of the Mist with her children Prince Harry, right, and Prince William as they tour Niagara Falls. (Associated Press)

Diana, Princess of Wales and her eldest son Prince William are seen waiting for Prince Harry after attending the annual Easter Sunday church service at St.Georges Chapel inside Windsor Castle, west of London. (Reuters)

The Princess of Wales and her son Prince Harry arrive at Helen Windsor's wedding. (Reuters)

The Princess of Wales helps adjust a snorkel mask for Prince William during a beach outing on the Caribbean island of St Kitts. (Reuters)

Lady Diana inspects with her eight-year-old son, Prince Harry, troops at the regiment's base of Bergen-Hohne. (Reuters)

Diana, Princess of Wales, with son Prince William, applaud the prize-giving ceremony for the Ladies Singles Final at the Wimbledon. (Reuters)

Diana, Princess of Wales, smiles as she walks through the pit area of the Silverstone racetrack with her son Prince Harry. (Reuters)

(From L to R) The Prince of Wales, Prince William, Princess Diana and Prince Harry attend the Heads of State ceremony in Hyde Park to commemorate the 50th Anniversary of VE Day. The ceremony is part of three days of events held in commemoration of those who died during World War II. (Reuters)

Princess Diana of Wales smiles as she sits with her sons, Princes Harry, front, and William, on the steps of the Royal Palace on the island of Majorca, Spain. (Reuters)

Princess Diana and Prince Charles, with their sons Prince Harry (L) and Prince William, stand outside Buckingham Palace. (Reuters)

The Princess of Wales and Prince Harry attend VJ (Victory over Japan) Day ceremonies in the Mall. The events are likely to mark Britain's last major World War Two remembrance. (Reuters)

The Prince and Princess of Wales, Prince Harry, and housemaster Dr Andrew Gayley (behind) escort Prince William (2R), second in line to the throne, for his first day of term at the world famous Eton College. (Reuters)

Princess Diana holds Prince Harry as her older son Prince William (L) looks out over the balcony of Buckingham Palace. (Associated Press)

Princess Diana puts on shoes for little Prince Harry as her other son Prince William squints from the bright sun during their vacation with the Spanish royal family at Marivent Palace in Palma De Mallorca. (Reuters)

Young Prince Harry, 3, yawns as his mother Princess Diana holds him during a morning picture session at Marivent Palace. (Reuters)

Princess Diana holds her son Prince Harry on her lap during a morning picture session at Marivent Palace, the summer home for the King and Queen of Spain. (Reuters)

Young Prince Harry tries to hide behind his mother Princess Diana during a morning picture session at Marivent Palace. (Reuters)

Princess Diana plays with Prince Harry by a stream. (Associated Press)

Princess Diana nurses Prince Harry on her lap as Prince William (C) plays in the sand on a private beach on Necker Island in the British Virgin Islands. (Reuters)