Duchess Kate dazzles in diamonds, pearls, and the Royal Order!

She's back, ladies and gents!

The Duke and Duchess of Cambridge were among several senior members of the royal family that joined the queen for a State Banquet at Buckingham Palace this evening, and Kate took "dazzle" to a new level. 

She was wearing her favorite color, blue, and her favorite tiara from the royal collection, the Cambridge Lover's Knot Tiara. But Kate kicked up the glamour by borrowing another incredible piece of royal jewelry, Queen Alexandra’s wedding necklace which is made of pearls and diamonds. 

Related: Duchess Meghan is gorgeous in blue for Fiji state dinner

Duchess Kate also wore a brand new accessory with a lot of meaning, one we've yet to see her wear. Adorned on the left shoulder of her pale blue Alexander McQueen gown, Kate wore the Royal Family Order of Queen Elizabeth II. It's the first time we have seen the Order on the duchess, though it's believed to have been given to her in December 2017.

15 PHOTOS
The Duchess of Cambridge at State Banquet
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The Duchess of Cambridge at State Banquet
LONDON, ENGLAND - OCTOBER 23: Catherine, Duchess of Cambridge during a State Banquet at Buckingham Palace on October 23, 2018 in London, United Kingdom. King Willem-Alexander of the Netherlands accompanied by Queen Maxima are staying at Buckingham Palace during their two day stay in the UK. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by John Stillwell - WPA Pool/Getty Images)
Britain's Catherine, Duchess of Cambridge, (L) walks with Rear Admiral Ludger Brummelaar (R) as they attend a State Banquet in honour of King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace in London on October 23, 2018, on the first day of the Dutch King and Queen's two-day state visit. (Photo by John Stillwell / POOL / AFP) (Photo credit should read JOHN STILLWELL/AFP/Getty Images)
The Duchess of Cambridge during the State visit by King Willem-Alexander and Queen Maxima of the Netherlands, at Buckingham Palace, London.
LONDON, ENGLAND - OCTOBER 23: Catherine, Duchess of Cambridge during a State Banquet at Buckingham Palace on October 23, 2018 in London, United Kingdom. King Willem-Alexander of the Netherlands accompanied by Queen Maxima are staying at Buckingham Palace during their two day stay in the UK. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by John Stillwell - WPA Pool/Getty Images)
LONDON, ENGLAND - OCTOBER 23: Catherine, Duchess of Cambridge walks with Rear Admiral Ludger Brummelaar during a State Banquet at Buckingham Palace on October 23, 2018 in London, United Kingdom. King Willem-Alexander of the Netherlands accompanied by Queen Maxima are staying at Buckingham Palace during their two day stay in the UK. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by John Stillwell - WPA Pool/Getty Images)
LONDON, ENGLAND - OCTOBER 23: British Prime Minister Theresa May walks with Prince William, Duke of Cambridge during a State Banquet at Buckingham Palace on October 23, 2018 in London, United Kingdom. King Willem-Alexander of the Netherlands accompanied by Queen Maxima are staying at Buckingham Palace during their two day stay in the UK. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by John Stillwell - WPA Pool/Getty Images)
Britain's Prince Charles, Prince of Wales (R) walks with Queen Maxima of the Netherlands (R) as they attend a State Banquet in honour of King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace in London on October 23, 2018, on the first day of the Dutch King and Queen's two-day state visit. (Photo by John Stillwell / POOL / AFP) (Photo credit should read JOHN STILLWELL/AFP/Getty Images)
Britain's Catherine, Duchess of Cambridge, attends a State Banquet in honour of King Willem-Alexander and Queen Maxima of the Netherlands at Buckingham Palace in London on October 23, 2018, on the first day of the Dutch King and Queen's two-day state visit. (Photo by John Stillwell / POOL / AFP) (Photo credit should read JOHN STILLWELL/AFP/Getty Images)
Queen Elizabeth II, Charles, Prince of Wales, Camilla, Duchess of Cornwall, King Willem-Alexander of the Netherlands and Queen Maxima of the Netherlands during State Banquet at Buckingham Palace, on the first of the 2 day state visit by the Dutch Royal Pair to the UK. Queen Maxima is wearing a rare crown, with a Stuart diamond, the Dutch Royal family inherited from King William and Queen Mary in 1702, when King William died. (Photo by DPPA/Sipa USA)
Queen Maxima of the Netherlands during State Banquet at Buckingham Palace, on the first of the 2 day state visit by the Dutch Royal Pair to the UK. Queen Maxima is wearing a rare crown, with a Stuart diamond, the Dutch Royal family inherited from King William and Queen Mary in 1702, when King William died. (Photo by DPPA/Sipa USA)
LONDON, ENGLAND - OCTOBER 23: Camilla, Duchess of Cornwall walks with Minister of Foreign Affairs of the Netherlands Stef Blok during a State Banquet at Buckingham Palace on October 23, 2018 in London, United Kingdom. King Willem-Alexander of the Netherlands accompanied by Queen Maxima are staying at Buckingham Palace during their two day stay in the UK. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by John Stillwell - WPA Pool/Getty Images)
LONDON, ENGLAND - OCTOBER 23: Queen Elizabeth II makes a toast alongside King Willem-Alexander of The Netherlands during a State Banquet to mark the state visit of King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands at Buckingham Palace on October 23, 2018 in London, United Kingdom. King Willem-Alexander of the Netherlands accompanied by Queen Maxima are staying at Buckingham Palace during their two day stay in the UK. The last State Visit from the Netherlands was by Queen Beatrix and Prince Claus in 1982. (Photo by Yui Mok - WPA Pool/Getty Images)
Queen Maxima of the Netherlands wears the Stuart Tiara as she poses for a photograph before a State Banquet at Buckingham Palace in London on October 23, 2018, on the first day of the Dutch King and Queen's two-day state visit. (Photo by Peter NICHOLLS / POOL / AFP) (Photo credit should read PETER NICHOLLS/AFP/Getty Images)
The Prime Minister walks with the Duke of Cambridge to the State Banquet at Buckingham Palace, London for their State Visit to the UK.
Queen Elizabeth II walks with King Willem-Alexander of the Netherlands to the State Banquet at Buckingham Palace, London for their State Visit to the UK.
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The Royal Order is an honor bestowed upon female members of the royal family by the queen, and is worn on formal occasions like this state banquet. Other royals who have been bestowed the order are The Duchess of Cornwall, the Countess of Wessex and the Princess Royal. 

Seeing Kate wear the Order further cements her role and important place in the royal family, and she wore it with pride. And looked fabulous doing so! 

Click through above to see more photos from the event, including the dazzling dress and tiara worn by Queen Maxima of the Netherlands (those diamonds!), and see below for more of Duchess Kate's most dazzling jewelry moments. 

9 PHOTOS
Kate Middleton's most impressive jewelry
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Kate Middleton's most impressive jewelry

The Cartier tiara, worn on her wedding day to Prince William, and the matching earrings given to her by her parents.

Photo: UK Press via Getty Images

Her diamond and sapphire engagement ring.

Photo: Chris Jackson/Getty Images

The Lotus Flower tiara, worn in 2013 to a Diplomatic Reception with Prince William.

Photo: Splash News

The ruby and diamond necklace and bracelet, which the Duchess wore to the Sun Military Awards in December 2011.

Photo: ARTHUR EDWARDS/AFP/Getty Images

A closer look at the necklace worn to the Sun Military Awards.

Photo: Indigo/Getty Images

The sparkling diamond fern brooch worn during the royal tour of Australia and New Zealand, when the royal family touched down in New Zealand.

Photo: Samir Hussein/WireImage

These vibrant blue sparklers, borrowed from her mom, Carole Middleton, and worth nearly $20,000.

Photo: Samir Hussein/WireImage

The Lotus Flower Tiara, again for a state reception with the President of China, paired with two diamond bracelets -- one called The Wedding Gift, with geometric elements, and the second, which has also been worn as a necklace. All of Kate's jewels were borrowed from the royal vault.

Photo: Dominic Lipinski/PA Archive

The Cambridge Lover's Knot Tiara, worn during a diplomatic reception at Buckingham Palace, one of the late Princess of Wales's favorite tiaras.

Photo: Yui Mok/PA Wire

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