Sarah left the Royal Family 26 years ago, but admitted to Oprah Winfrey in a 1996 interview she was allowed to keep the stunning piece of jewellery.

The Duchess of York wore it to the White Tie and Tiara Ball hosted by Elton John at his house in Windsor on July 5, 2001, despite divorcing in 1996.

It was believed the tiara would make another appearance and be worn by Princesses Eugenie and Beatrice at their weddings, but instead they opted for different designs.

The York tiara, designed by Garrad, has not been seen since 2001, but as it was a gift Sarah was able to keep it.

Royal fans took to Instagram praising the tiara.