Kate Middleton Decorates Christmas Tree In Cozy Sweater Ahead Of Holiday Concert [Watch]

Kate Middleton is getting into the holiday spirit!

Middleton is hosting her second annual "Royal Carols: Together at Christmas" on Thursday, and on the eve of the big event, a new video was released showing the Princess of Wales decorating a Christmas tree at London's Westminster Abbey, where the event will be held.

"Final touches before the #TogetherAtChristmas' Carol Service tomorrow," read the caption of the video shared via the Prince and Princess of Wales' Twitter page.

The clip featured a smiling Middleton looking cozy in a Fair Isle turtleneck sweater as she added ornaments to a towering fir, with cheerful music playing in the background.

The video received warm responses from royal fans, who expressed their excitement for the concert. Many also praised Prince William's wife for her efforts to spread the holiday spirit.

"I love Christmas! Thank you for making positivity and joy a priority this holiday season," royal commentator and host of the "To Di for Daily" podcast Kinsey Schofield commented.

"Wonderful! We are proud of you, Catherine!!!" a second Twitter user wrote.

Another person added, "Thank you so much for this, just beautiful. My family and I think the world of your beautiful family."

Thursday's holiday concert is spearheaded by Middleton and sponsored by The Royal Foundation. It will be a royal family affair as she will be joined by her husband Prince William and in-laws King Charles and Queen Consort Camilla.

More royal family members are expected to come and watch the musical evening, People reported.

Last month, Middleton asked for the public's help in choosing the upcoming concert's closing song, creating a poll between three songs. "Help us decide the final carol for 'Together at Christmas,'" she wrote.

The winning tune, "O Come, All Ye Faithful," will close the show, sung by the Abbey Choir.

The upcoming event will unite charity staff, community volunteers, frontline workers, military personnel and more to "celebrate the joy that human connection can bring," according to Buckingham Palace.

This year's performance will also pay tribute to Queen Elizabeth II, who passed away on Sept. 8.

"This year's carol service is dedicated to Her Majesty Queen Elizabeth II and the values Her Majesty demonstrated throughout her life, including duty, empathy, faith, service, kindness, compassion and support for others," the palace said.

"These principles are shared and personified by the inspirational guests who have been invited to the Abbey in recognition of their tireless work to help and care for those around them," the palace added.

During last year's holiday concert, Middleton surprised royal fans when she debuted her skills as a pianist publicly for the first time. She joined Tom Walker for a performance of his song, "For Those Who Can't Be Here."

Middleton called the collaboration a "once-in-a-lifetime experience."

The musician also gushed over the royal's performance. "I thought she absolutely smashed the performance; it's not easy to just jump behind a piano with a bunch of musicians you've never played with before and record live takes to camera, but she completely nailed it," Walker said at the time.

"Royal Carols: Together At Christmas" will air on ITV on Christmas Eve at 7 p.m. local time.