Kate Middleton attends Christmas concert on Dec. 8, 2023.Photo:HENRY NICHOLLS/AFP via Getty

Catherine princess of wales westminster london kate middleton 12 07 23

HENRY NICHOLLS/AFP via Getty

Kate Middletonis keeping up a new Christmas tradition!

On Friday, the Princess of Wales stepped out at Westminster Abbey for the third annual holiday carol concert. Princess Kate, 41, started the tradition in 2021 and is still going strong.

The London venue, decked out in Christmas trees, wreaths and other holiday decor for the festive evening, also has a very special meaning for the royal — it’s where she wedPrince Williamin April 2011!

Princess Kate arrived at the event — wearinghead-to-toe winter white! — and greeted the clergy and some of the evening’s performers before the service began.

Kate Middleton and Adam Lambert at Christmas concert on Dec. 8, 2023.Chris Jackson/Getty

Kate Middleton princess of Wales Catherine Christmas carols London 12 08 23 Adam lambert

Chris Jackson/Getty

And for the first time, all three ofPrincess Kate’s children were in attendance! Kate met her family — Prince William,Prince George,Princess CharlotteandPrince Louis— outside to walk into the event together…but first, her children made an important stop at a red postbox to mail letters to kids who might be struggling this year.

While Prince George and Princess Charlotte attended the event last year, it markedPrince Louis' debut.

Kate Middleton, Prince William and their children attend the Christmas concert on Dec. 8, 2023.Chris Jackson/Getty

Kate Middleton princess of Wales Catherine Christmas carols London 12 08 23 william louie george charlotte

This year’s Christmas carol concert is linked to Princess Kate’sShaping Us campaign, which focuses on her mission to support children during the early years of their lives.

Among the congregation are parents, early educators, midwives, health visitors and community volunteers who are both raising kids and “playing a vital role in shaping the society of tomorrow.”

“So, this Christmas, as we reflect upon the past year and look towards the future, let’s cherish the importance of new life and remember the unique hope that this brings,” the source adds. “And together, let’s commit to nurture the earliest years in a child’s life, not simply for the sake of our children, but for the future health and happiness of our communities and our society.”

Kate Middleton attends Christmas concert on Dec. 8, 2023.Jeff Spicer/Getty

Kate Middleton princess of Wales Catherine Christmas carols London 12 08 23

Jeff Spicer/Getty

“This is the culmination of a lot of things that the Princess has led on this year,” Ross tells PEOPLE.

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Founder Bianca Sakol was among the congregation, seated just behind the royal family. “The service was absolutely beautiful, absolutely perfect — we loved it,” she tells PEOPLE.

She adds that since Kate’s visit, there has been a big rise in donations of goods and in offers of help from businesses in the area. “It’s really raised our profile in the community," Sakol says.

Kate Middleton hosts Christmas concert on Dec. 8, 2023.Chris Jackson/Getty

Kate Middleton princess of Wales Catherine Christmas carols London 12 07 23

Though the Princess of Wales didn’t play piano at the 2022 show on Dec. 15, 2022, the festive event was again held to bring together members of the royal family with charity staff, community volunteers, frontline workers, military personnel and more to “celebrate the joythat human connection can bring,” Buckingham Palace said.

Princess Charlotte, Prince Louis and Prince George attend Christmas concert on Dec. 8, 2023.Chris Jackson/Getty

Princess Charlotte of Wales, Prince Louis of Wales and Prince George of Wales post letters to Santa before The “Together At Christmas” Carol Service at Westminster Abbey on December 08, 2023 in London, England.

Last year’s program was woven withtributestoQueen Elizabeth, who died in September 2022 at age 96.

“This carol service is dedicated to Her Majesty Queen Elizabeth II and to all those who are sadly no longer with us. Her Late Majesty’s strongly held values of duty, compassion and faith have guided the creation of this service,” a message inside the program forRoyal Carols: Together at Christmasread.

As the service began, a film played highlighting how the late Queen was at the heart of Christmas Day for so many people with her annual holiday address. Prince William also gave a poignant reading and revisited his late grandmother’sChristmas broadcastfrom 2012.

Princess Charlotte, Kate Middleton and Prince George attend Christmas concert on Dec. 8, 2023.Chris Jackson/Getty

Princess Charlotte of Wales, Catherine, Princess of Wales and Prince George of Wales attend The “Together At Christmas” Carol Service at Westminster Abbey on December 08, 2023 in London, England. Spearheaded by The Princess of Wales, and supported by The Royal Foundation, the service is a moment to bring people together at Christmas time and recognise those who have gone above and beyond to help others throughout the year.

source: people.com