Princess Diana through the years

Princess Diana greets patients and visitors while touring the Cook County Hospital pediatric ward in Chicago on June 5, 1996. The Princess was on a three-day visit to Chicago.

Lady Diana, Princess of Wales and Jemima Khan, wife of Pakistani cricketer Imran Khan, attend a variety show on Feb. 22 1996 in Lahore. Lady Diana was on a private visit to Pakistan to participate in the fundraising campaign for Khan's cancer hospital.

Princess Diana, her sons Harry and William, and Prince Charles watch the parade march past as part of the commemorations of VJ Day on Aug. 19, 1995 in London. The commemoration was held outside Buckingham Palace and was attended by 15,000 veterans and tens-of-thousands of spectators.

Diana, accompanied by her son Prince Harry, family friend Catherine Soames, and her son Harry on Mar. 24, 1994. The Princess and her family arrived for their traditional pre-Easter break at the resort in Lech, Austria.

The Princess of Wales making an announcement on Dec. 3, 1993, that she will be making a dramatic cut in her public duties and profile. The Princess was at a lunch at the Hilton Hotel for Headway, the National Head Injuries Association.

Princess Diana, along with her friends Kate Menzies and Catherine Soames rides the Splash Mountain ride at Disney World's Magic Kingdom during the third day of their vacation in August of 1993. Front row left is Prince Harry.

Diana waving to the crowd as she arrives at the Cite de la Musique at La Villette in Paris on Nov. 14, 1992.

Princess Diana of Wales visits the great pyramid of Giza, 15kms from Cairo on May 12, 1992. The princess was on a six-day tour.

Princess Diana and Prince Harry stand for the National Anthem at the Wales v Australia match during the 1991 World Cup at Cardiff Arms Park in Cardiff, Wales. Australia won the match 34-3.

Princess Diana posing for photographers next to the monument of Christ the Redeemer in Rio de Janeiro on April 25, 1991.

Former First Lady Barbara Bush and Princess Diana face photographers, after having coffee at the White House, in Washington, DC on Oct. 5, 1990. Mrs. Bush and Princess Diana discussed the AIDS epidemic before the princess left to visit a home for young AIDS victims.

Princess of Wales Diana, during her visit to the Footscray Park in the suburb of Melbourne on Jan. 27, 1988.

Diana, Princess of Wales, wearing a Japanese Kimono during her first visit to the ancient city of Kyoto, central Japan in May of 1986.

US President Ronald Reagan and his wife Nancy welcome Princess Diana and her husband Prince Charles on November 9, 1985. The Royal Couple were in Washington, D.C. for a three-day visit before traveling on to Florida.

A combo image showing the wedding of Lady Diana, Princess of Wales with Prince Charles of Wales at St Paul Cathedral in London on July 29, 1981 and an image showing Kate Middleton standing at the altar with her husband to be Prince William at Westminster Abbey on April 29, 2011.