Princess Diana's glittering wedding tiara remains under lock and key, kept safely within the Spencer family's private ...

Princess Diana wore her family's Spencer Tiara on her wedding day, and it could be passed down to her granddaughter Princess ...

The Spencer Tiara, worn by Princess Diana on her wedding day in 1981 | Adrian Dennis/AFP via Getty Images In the British royal family, most brides wear a tiara from the queen’s collection.

The tiara belongs to the Spencer family not the Royal family and was even worn by Kitty's own mother, Victoria Aitken when she wed Charles Spencer in 1989, making it even more surprising that the ...

Spencer Tiara The Spencer Tiara was the first tiara Princess Diana ever wore and one we haven’t seen since her passing. However, it’s not technically a crown jewel.

The Spencer family tiara was made in the 1930s by Garrard from a much older family heirloom and was loaned to Princess Diana in the 1980s. Diana photographed wearing the tiara on November 16, 1986.

Although the Spencer Tiara has been shown to the public through various museum exhibitions over the past few decades, it had not been publicly worn since Princess Diana’s death in 1997.

Designed by Elizabeth and David Emanuel, Diana's gown was truly fit for a princess — and embodied plenty of bridal trends ...

The tiara — which is said to have been created in 1767, according to Sotheby’s — was most recently worn by Celia McCorquodale, the daughter of Diana and Earl Spencer’s sister, Lady Sarah ...

When Princess Diana married Prince Charles in 1981, she completed her bridal look with the Spencer tiara, a piece of jewelry that has since become almost as iconic as her dress.

The tiara is currently on loan to Sotheby's from Diana's brother, Earl Spencer. The Spencer Tiara has been in their family for over a century, but was assembled slowly over a matter of years.