Kate sparkles in Queen's heirloom necklace that Diana also wore

Bianca Soldani

It was celebration time for the royal family on Monday night as they gathered at Windsor Castle to mark the Queen and Prince Phillip’s 70th wedding anniversary.

And Kate Middleton had her own special way of paying tribute to the couple.

The soon to be mum-of-three slipped into a sleek black gown for the evening and accessorised with one of the Queen’s own necklaces.

Kate Middleton and the queen

Kate was seen arriving for the party wearing the Queen's necklace. Photo: Getty

Diana pearl necklace

Diana has also borrowed the necklace before. Photo: Australscope and Getty

The pearl choker features four strings of peals joined together in the centre by a decorative diamond clasp.

Queen Elizabeth has worn the piece a number of times in public, and so did Kate’s mother-in-law, Princess Diana.

Diana was a fan of pearl necklaces and had a collection of pearl chokers as well, but she wore the Queen’s one while at a banquet back in 1982 at Hampton Court Palace in London.

Just a couple of months ago, Kate arrived at a state dinner wearing Diana’s favourite pearl tiara. Again, this was originally a gift from the Queen that was gifted to Diana as a wedding present after the Queen herself had it handed down from Queen Mary.

Princess Diana's jewellery

Diana had a few pearl chokers of her own. Photo: Getty

Duchess of Cambridge Kate Middleton

Kate wore one of Diana's favourite tiaras. Photo: Getty

Queen Elizabeth has known her husband almost all her life, after they first met when she was just 13.

So it was no surprise she didn’t struggle to think of the perfect gift for him, and celebrated their platinum anniversary by giving him a knighthood.

According to People, 96-year-old Prince Philip was handed a Knight Grand Cross of the Royal Victorian Order, which is only given to people who have loyally served the Queen.

Prince Philip and Queen Elizabeth wedding photo

The couple were married in 1947 at Westminster Abbey. Photo: Getty Images

A young Elizabeth was introduced to 18-year-old Philip in 1939, and they went on to fall madly in love and exchanged countless letters when Philip went off to serve in World War II.

He eventually got down on one knee and proposed in 1946 when the pair were holidaying in Balmoral.

The Queen and Prince Philip wedding anniversary

The Queen gave Prince Philip a knighthood for their wedding anniversary. Photo: Getty Images

Got a story tip? Send it to tips@yahoo7.com.au

Want more celebrity, entertainment and lifestyle news? Follow Be on Facebook, Twitter, Pinterest, Tumblr and Instagram