Kate Middleton in Donned in White Outfit (Photo : Getty Images/Jeff Spicer)
Prince Louis of Wales, Prince George of Wales, Princess Charlotte of Wales, Prince William, Prince of Wales and Catherine, Princess of Wales attend The "Together At Christmas" Carol Service at Westminster Abbey on December 08, 2023 in London, England.

Kate Middleton exuded sophistication as she hosted her third "Together at Christmas" carol concert at London's Westminster Abbey Friday.

The Princess of Wales, 41, donned a pristine Chris Kerr coat over a classic ivory sweater, paired with high-waisted Holland Cooper trousers. 

Princess Kate’s head-to-toe winter white ensemble marked a notable departure as she opted for trousers, a first for the festive event.

Her hair cascaded in loose curls, and she adorned herself with Van Cleef and Arpels Magic Alhambra drop earrings, a piece she's worn on multiple occasions, as reported by Page Six.

Continuing the winter white theme, Middleton complemented her outfit with a top-handled Strathberry bag and white pumps, showcasing her impeccable sense of style and attention to detail. 

Middleton also wore a sparkling white look for a special "Together At Christmas" promo that aired on ITV1 Thursday night before the big event. 

In the promo, she debuted a new tweed Self-Portrait jacket adorned with sequin and pearl trim.

Accompanying Princess Kate to Friday's Christmas carol concert were Prince William, 41, and their children — Prince George, 10, Princess Charlotte, 8, and Prince Louis, 5 — coordinated in navy blue attire.

Princess Charlotte was seen in navy tights paired with a burgundy coat that she also sported at last year's concert, Page Six noted.

The children deposited letters to Santa Claus in a special mailbox outside the Abbey, adding a touch of familial joy to the festive event.

Pippa Middleton, Princess Kate's younger sister, graced the concert in a stylish tweed Saloni jacket ($304) paired with a black ribbon belt and matching trousers.

This marked her second public appearance of the week following the British Heart Foundation's Heart Hero Awards in London Wednesday night, Page Six reported.

While Princess Kate's choice of trousers aligns with her recent inclination towards pantsuits and separates, her sartorial history at the Christmas concert typically featured festive red coats with dresses.

In contrast to her autumn wardrobe, which predominantly consisted of trouser suits, the Princess of Wales recently wore a glittering Jenny Packham gown and the Lover's Knot Tiara for the annual Diplomatic Corps Reception at Buckingham Palace earlier in the week.