The tiaras worn by Catherine, the Princess of Wales

Catherine, the Princess of Wales, is one incredibly lucky woman.

Not only is she married to Prince William, with three beautiful children, but Kate also has access to the most incredible jewels in the world.

But since her royal wedding, despite attending many official royal functions, Kate has worn just a handful of different tiaras on less than 20 occasions.

Continue through to see the tiaras worn by the Princess of Wales.

Kate has added a new tiara to her repertoire, and it's one that reportedly hasn't been seen in public in almost 90 years.

Attending the State Banquet for South Korean President Yoon Suk Yeol at Buckingham Palace on November 21, 2023, the Princess of Wales wore the Strathmore Rose Tiara.

According to The Court Jeweller, the beautiful floral headpiece was a gift to Queen Elizabeth, the Queen Mother, from her parents on the occasion of her marriage to the future King George VI.

X account The Royal Watcher claims the Strathmore Rose Tiara hasn't been worn publicly in almost nine decades, its last outing taking place in the 1930s.

This is only the fourth tiara we have seen the Princess of Wales wear during her time in the royal family – and she is the only royal to wear it publicly since the Queen Mother.

Keep reading to see the other beautiful pieces in her rotation.

Attending a Diplomatic Corps reception at Buckingham Palace on December 6, Kate dusted off a tiara we haven't seen her wear in seven years.

The Princess of Wales wore the beautiful Lotus Flower Tiara, which she last wore at a palace banquet in 2015.

The headpiece was crafted from a necklace Queen Elizabeth, the Queen Mother received as a wedding present from her husband, later King George VI, in 1923.

She had the diamond and pearl necklace turned into a tiara just six months after receiving it.

The Princess of Wales wore her favourite tiara for a state banquet hosted by King Charles on November 22, 2022.

Catherine chose Queen Mary's Lover's Knot tiara, a headpiece she has regularly worn since 2015.

It was also loved by Diana, Princess of Wales.

Catherine wore Diana's diamond and South Sea pearl earrings and an Art Deco diamond brooch pinned to her sash.

Her embellished white gown is by British designer Jenny Packham.

The state banquet, in honour of South Africa's president, is the first hosted by the new monarch and the first held since 2019.

Continue through to learn more about the Lover's Knot tiara.

On the day she became the Duchess of Cambridge, Kate Middleton wore her very first tiara.

Kate chose the Cartier Halo tiara for her royal wedding to Prince William on April 29, 2011, at Westminster Abbey.

The piece was borrowed from the Queen's collection.

It was originally made for the Queen Mother in 1936, a commission from her husband King George VI.

The Cartier Halo tiara is set with 739 brilliant-cut diamonds and 149 baton-cut diamonds.

Kate had a pair of earrings made to match her tiara, created by Robinson Pelham, also a wedding gift from her parents, Michael and Carole Middleton.

The earrings feature an acorn and oak leaf — a nod to the Middleton family's coat of arms.

Kate's wedding has been the only time she has worn the Cartier Halo tiara.

Kate's first post-wedding tiara moment came in December, 2013, when she attended the annual Diplomatic Corps reception at Buckingham Palace.

Kate chose the stunning Lotus Flower tiara, and an icy-blue Alexander McQueen gown. Unfortunately, photos from the night are virtually non-existent.

Thankfully, we were able to see the tiara on October 20, 2015, when the Duchess of Cambridge attended a state banquet at Buckingham Palace (pictured here).

The state banquet was held in honour of Chinese President Xi Jinping, who was visiting London.

Kate wore the Lotus Flower tiara for the event along with a red Jenny Packham gown. The piece is also known as the Papyrus tiara.

It was originally a necklace gifted to Lady Elizabeth Bowes-Lyon from her husband, the future King George VI, in 1923.

Elizabeth had the necklace, made by royal jewellers Garrard & Co., dismantled and remade into the tiara.

Queen Elizabeth wore the tiara many times during her husband's reign before it was passed on to her daughter, Princess Margaret who was another frequent wearer of the piece.

The tiara can be worn with either diamond or pearl toppers.

The Duchess of Cambridge delighted royal watchers everywhere when she first wore this tiara on December 8, 2015, for the annual Diplomatic Corps reception.

The Queen Mary's Lover's Knot tiara has since become Kate's most worn piece.

It was a favourite of Diana, Princess of Wales, who wore it many times since marrying Prince Charles in 1981.

Kate re-wore her blue Alexander McQueen gown for the event inside Buckingham Palace.

A year later for the same event, Kate chose the Queen Mary's Lover's Knot tiara once again.

She also brought back her red Jenny Packham gown for the occasion, on December 8.

The Duchess of Cambridge was among the guests at the Diplomatic Corps reception, along with Her Majesty the Queen, the Duke of Edinburgh, Prince Charles and Camilla, the Duchess of Cornwall.

We got a closer look at the Queen Mary's Lover's Knot tiara when Kate was photographed leaving the Diplomatic Corps reception.

The tiara is frequently called the Cambridge Lover's Knot tiara, but that tiara is a separate piece.

Queen Mary was a big admirer of the Cambridge Lover's Knot tiara, which was made in 1818 for her grandmother Princess Augusta of Hesse.

That tiara passed to Queen Mary's aunty, Grand Duchess Augusta of Mecklenburg-Strelitz.

Queen Mary loved the piece so much she had a replica made in 1913, which became known as the Queen Mary's Lover's Knot tiara.

The original Cambridge Lover's Knot tiara was later sold at auction at Christie's in Geneva in May, 1981, for more than $747,000 to an anonymous buyer and is presumed to be in an unknown private collection.

On July 12, 2017, the Duke and Duchess of Cambridge attended a state banquet at Buckingham Palace for King Felipe VI and Queen Letizia of Spain.

The duchess wore the Queen Mary's Lover's Knot tiara and a blush-pink Marchesa gown.

Along with wearing Princess Diana's favourite tiara, Kate also chose a pair of earrings from her late mother-in-law's personal collection.

The Collingwood pearl and diamond earrings were gifted to the Princess of Wales on her wedding and became one of her most frequently worn pair of earrings.

Princess Diana's Collingwood pearl earrings have since been worn by the Duchess of Cambridge many times, including at the christening of Archie Harrison Mountbatten Windsor in 2019.

She paired the Queen Mary's Lover's Knot tiara and earrings with a stunning necklace belonging to Queen Elizabeth.

The King George VI and Queen Elizabeth Bandeau necklace features diamonds and rubies and was made by Boucheron in 1907.

The necklace was gifted to Queen Elizabeth II from her parents on her wedding day in 1947.

It was originally left to the Queen Mother by Mrs. Ronnie Greville.

Queen Elizabeth wore the necklace to a banquet during her visit to Australia in 1954.

On December 5, 2017, the Duchess of Cambridge attended the annual Diplomatic Corps reception at Buckingham Palace.

The Queen Mary's Lover's Knot tiara adorned her head once again as did Princess Diana's Collingwood pearl earrings.

Kate also borrowed a collet diamond necklace from Queen Elizabeth.

Because of a lack of photos from the event, not much is known about Kate's sparkly white Jenny Packham gown.

The Duchess of Cambridge wore the Queen Mary's Lover's Knot tiara for a state banquet at Buckingham Palace on October 23, 2018.

The event was in honour of King Willem-Alexander and Queen Maxima, who were visiting from the Netherlands.

Kate stunned in a pale blue Alexander McQueen ballgown and statement necklace made from diamonds and pearls.

The piece is known as Queen Alexandra's Wedding Necklace and is part of Queen Elizabeth's vast jewel collection.

It was given to Queen Mary who passed it on to the Queen Mother, who wore the necklace frequently during her life.

Kate also wore the Royal Family Order – a yellow ribbon with a portrait of the Queen surrounded by diamonds – on her chest for the first time.

The Duchess of Cambridge clearly favours the Queen Mary's Lover's Knot tiara, seen here at the Diplomatic Corps reception at Buckingham Palace on December 4, 2018.

The Royal Family Order, made from glass and not the traditional ivory, is pinned to her chest. It features a portrait of Her Majesty the Queen.

Kate also wore Princess Diana's Collingwood diamond earrings, once again.

Because cameras were allowed into the event for the first time, we were able to see a full-length shot of Kate's sparkling Jenny Packham gown.

The Diplomatic Corps reception is an annual event hosted by the Queen and senior members of the royal family, for ambassadors and high commissioners to the UK, and government officials.

The members of the Diplomatic Corps support the work of the royal family in representing the UK both at home and abroad.

The Duchess of Cambridge chose the Queen Mary's Lover's Knot tiara for a state banquet in honour of US President Donald Trump and the First Lady, on June 3, 2019.

Kate was seen walking through the East Gallery at Buckingham Palace with United States Secretary of the Treasury, Steven Mnuchin.

Kate teamed her tiara with a white Alexander McQueen gown and sapphire and diamond earrings from the Queen Mother's jewellery collection.

Attached to her gown was the Dame Grand Cross of the Royal Victorian Order sash, presented to Kate by Queen Elizabeth in recognition of services to the Crown, in April, 2019.

On December 11, 2019, the Duchess of Cambridge attended the Diplomatic Corps reception at Buckingham Palace.

The Queen Mary's Lover's Knot tiara was there, once again.

Another standout piece of Kate's outfit was a necklace borrowed from the Queen's personal jewellery collection.

The duchess wore the Nizam of Hyderabad diamond necklace, given to the monarch for her wedding in 1947.

It has been seen on Kate just once before, in 2014, at the National Portrait Gallery in London.

Kate also chose a pair of the Queen's diamond chandelier earrings, a new addition to the duchess's repertoire.

Kate chose a navy-blue velvet gown by Alexander McQueen for the occasion with the Dame Grand Cross of the Royal Victorian Order sash across her body and the Royal Family Order on her chest.

The Queen Mary's Lover's Knot tiara was the outfit's crowing glory, and is without doubt Kate's favourite headpiece.

Its maker Garrard and Co. describes the Lover's Knot tiara as featuring "a design that use the symbols of love to great effect".

"The regal design of this much-admired tiara is set with brilliant and rose cut diamonds, and 19 baroque pearls and has proved popular with every succeeding generation of the royal family," Garrard says on its website.

"There is no beginning or end to the sweep of diamonds that loop around the tiara, designed in 1913. They overlap to create a series of heart-shaped knots, which evoke the strength and constancy of love.

"Baroque pearls hang from each knot, their different shapes and sizes reinforcing the uniqueness of the headpiece."