Kate Middleton Looks Stunning In Burgundy; Arrives With William, Charlotte, George For Christmas Concert

Kate Middleton got her family's support during her big event Thursday.

Middleton looked stunning in her bespoke burgundy coat dress by Eponine when she arrived to host her second annual Christmas concert at Westminster Abbey for "Royal Carols: Together At Christmas." She completed her outfit with matching pumps.

The Princess of Wales arrived with her husband, Prince William, and their two children, Prince George, 9, and Princess Charlotte, 7. The family perfectly coordinated their ensembles, with Princess Charlotte wearing a similar burgundy dress to her mom and Prince George sporting a black suit like his dad. The heir to the throne chose a tie that matched his wife and daughter's outfits.

Prince Louis, 4, was noticeably missing. The youngest member of the family appeared to have stayed at home.

The sight of Prince William and Middleton with their two kids pleased royal fans. Many were very happy that the Waleses were together, but some asked where Prince Louis was and why he wasn't around.

"It was such a beautiful surprise to see Prince George and Princess Charlotte with the rest of the family tonight. I can't wait to watch the service on Christmas Eve," one commented on their post on Twitter that included a family photo from the event.

"Don't they have 3 kids? Why do they only go out with two most of the time?" another added.

"Think back to the Jubilee concert. Louis is too young to be expected to stay quiet and still for that length of time, especially at the end of a long day at school. Charming though he is, I think leaving him at home was the right decision," another speculated about the youngest member of the family's absence at the concert.

Aside from the Waleses, more members of the royal family showed up to support Middleton. King Charles and Queen Consort Camilla were also present. Princess Eugenie and her husband Jack Brooksbank; Princess Beatrice and her husband Edoardo Mapelli Mozzi; Zara and Mike Tindall; Sophie, Countess of Wessex; Lord Frederick Windsor and his wife Sophie Winkleman; and Lady Gabriella Windsor and her husband Tom Kingston were all in attendance.

Middleton's family was also there to join the celebration. Carole and Michael Middleton were seen walking with the Duchess of Cambridge's younger sister, Pippa.

The Christmas concert brought together the members of the royal family with charity staff, community volunteers, frontline workers, military personnel and more to "celebrate the joy that human connection can bring."