Kate Middleton just out princessed herself.

The Duchess of Cambridge, Princess Kate Middleton has donned a tiara for only the third time while attending her first ever State Banquet.

The banquet was held at Buckingham Palace and hosted guest of honour, Chinese President Xi Jinping. While we’re sure all of the formal affairs were in order, what we’re most interested in is what Kate Middleton was wearing, including which tiara she chose.

The Duchess of Cambridge looked exquisite of course and chose to wear one of Princess Margeret’s favourite crown jewels – the Lotus Flower tiara.

Swoon…

The Duchess of Cambridge, Prince William and Queen Elizabeth hosted the banquet. The Queen, 89 led the entrance with Chinese President Xi Jinpin and Prince Phillip, 94 entered with Jinping's wife, Madame Pang Liyuan.

The Duchess was seated bwteen Xi JinPing and His Excellency Wang Huning. She looked composed, stunning, elegant, gracious and complete royal perfection.

Here she is. (Post continues after the gallery)...

During the evening they dined on West Coast Turbot filet with lobster mousse and a roasted loin of Balmoral venison in madeira and truffle sauce, accompanied by champagne and wine.

Kate wore a red Jenny Packham gown that complimented the Lotus Flower tiara flawlessly.

The tiara is known to be one of Princess Margaret's favourites.

The Duchess of Cambridge absolutely stole the show as always. We just want to own her entire wardrobe (and tiara selection). *Insert heart eye emoji here*

What do you think of Kate Middleton's outfit?