Princess Diana left her iconic wedding dress to the care of her second son Prince Harry. The year before she died, she, apparently, changed her will to include that Prince Harry must inherit her gown while her first-born, Prince William, will have her engagement ring.

According to reports, Princess Diana wanted her sons to receive these gifts when they turned 25. However, the court allowed Lady Di's mother, Frances Ruth Shand Kydd, and sister, Lady Elizabeth Sarah Lavinia McCorquodale, who were the trustees of her will upon her death, to make slight changes to the will so that her sons would receive the valuable treasures when they reach the age of 30. 

Princess Diana's wedding gown, dubbed the "most closely guarded secret in fashion history," was short of impressive. Designed by David and Elizabeth Emanuel, its details were never revealed to the public until that dramatic moment Princess Diana stepped out of Clarence House to go to church and marry Prince Charles in 1981. 

Many hailed the gown because Princess Diana looked like a fairy tale princess. The gorgeous was made of ivory taffeta with tons of laces, 10,000 pearls, elaborate embroidery, and a 25-foot train. It was replicated many times over but the imitations were never as perfect as the original piece. 

According to the designers, Princess Diana's wedding gown earned its keep as it has been brought to many museums around the globe for exhibits. Apparently, more people abroad have seen the gown than the average local British person and it's still one of the most talked about dresses for nearly four decades. 

Princess Diana, tragically, died in a car crash in Paris, France in 1997. Her death received an outpouring of grief around the world, especially because she was leaving her 15-year-old and 12-year-old boys without their mother. The Princess of Wales was very close to her boys and she always ensured that Prince William and Prince Harry would look after each other.

In changing her will in 1996, Princess Diana wanted her estate to be under a trust for her sons. This was also the year she and Prince Charles officially divorced as they have been living separately for many years. 

Now a treasured family heirloom, Princess Diana's gown is kept along with the deceased royals' other possessions. Her engagement ring, however, is now with Kate Middleton, the Duchess of Cambridge, Prince William's wife.