An exhibition titled Diana: Her Fashion Story will open at the London residence, where Diana lived for 15 years, on 24 February next year (17). The exhibition coincides with the 20th anniversary of her tragic death in a car crash in Paris, France in August, 1997.

The collection will feature the iconic blue velvet Victor Edelstein gown she wore at the White House in 1985 when she famously danced with John Travolta and a pale pink Emanuel blouse she wore in her engagement portrait taken by Lord Snowdon in 1981.

While a blue tartan Emanuel suit dress, sported during an official visit to Venice, Italy in the 1980s, will be put on public display for the first time.

"Diana, Princess of Wales, was one of the most photographed women in the world, and every fashion choice she made was closely scrutinised," exhibition curator Eleri Lynn said in a statement. "Our exhibition explores the story of a young woman who had to quickly learn the rules of royal and diplomatic dressing, who in the process put the spotlight on the British fashion industry and designers."

The collection, which has the blessing of her sons Prince William and Prince Harry, will also feature original sketches made by fashion designers for the royal and chart her style evolution, showing how she grew in confidence and took control over her look.

Meanwhile, the sunken garden at the royal residence, which was reportedly one of Diana's favourite places to relax, will also be planted with her favourite flowers, including English white roses, over the spring and summer (17).

"We hope to capture the energy and spirit which made her such a popular figure around the world," Sean Harkin, Gardens Team Leader, said.