Kate Middleton played piano with her daughter, Princess Charlotte, in a sweet mother-daughter duet.

The surprise moment aired on her Christmas Eve "Together at Christmas" carol service as the opening segment.

In the clip, the Princess of Wales sat beside her daughter for a rendition of "Holm Sound" by Erland Cooper.

She shared the moment on the @PrinceandPrincessofWales social media page Wednesday.

PRINCE WILLIAM EAGER TO DITCH OUTDATED ROYAL CHRISTMAS TRADITIONS AS KING CHARLES RESISTS THE CHANGE: EXPERT

"Love and connection through music. A special duet playing Holm Sound by @erlandcooper to open this year's 'Together at Christmas' Carol Service," the post was captioned. "Watch Royal Carols: Together at Christmas on ITVX now."

"At its heart, Christmas speaks of love taking full bloom in the simplest, most human ways," the mother of three is heard saying in the Instagram clip.

CLICK HERE TO SIGN UP FOR THE ENTERTAINMENT NEWSLETTER

Princess Kate wore a dark blue gown, and Princess Charlotte wore a plaid skirt with a blue blouse.

APP USERS CLOCK HERE FOR POST

LIKE WHAT YOU’RE READING? CLICK HERE FOR MORE ENTERTAINMENT NEWS

"Not in sentimental or grand gestures, but gentle ones, a moment of listening, a word of comfort, a friendly conversation, a helping hand. Presence. These simple acts of care might seem small, but they contribute to the beautiful tapestry of life to which we all belong," she added.

In the clip, Princess Charlotte was joined by siblings Prince George and Prince Louis, adding Christmas decorations with their names handwritten on them to the tree located outside of Westminster Abbey.

Princess Charlotte, Prince George and Prince Louis all coordinated in dark blue and white accented looks.

Prince William wore a dark blue suit, and Princess Kate opted for a dark green calf-length coat.

She ended the clip by wishing everyone a "very happy Christmas."

The clip is part of the "Together at Christmas" special.

The footage included also shows guests arriving for the service Dec. 5 at Westminster Abbey.

Sebastian Telfair, a 2004 NBA Draft first-round selection, has faced multiple legal issues over the years.

Telfair was released from prison this week after serving time for a probation violation related to his 2023 NBA health care fraud conviction. The former Phoenix Suns guard served his term in the same federal prison that houses disgraced music mogul Sean "Diddy" Combs.

Telfair told TMZ Combs is maintaining a positive outlook as he serves his time.

CLICK HERE FOR MORE SPORTS COVERAGE ON FOXNEWS.COM

"Diddy's holding it down. He's doing what he gotta do. And where he's at, they're going to help him," Telfair told the outlet.

EX-NBA STAR SEBASTIAN TELFAIR PLEADS TO TRUMP PARDON BEFORE REPORTING TO JAIL

Earlier this year, a jury found Combs guilty on two counts of transporting individuals for the purpose of prostitution. He was acquitted on more serious charges.

In October, a judge sentenced Combs to 50 months behind bars. He was subsequently transferred from the Metropolitan Detention Center in Brooklyn to a federal prison in New Jersey known as Fort Dix, where Telfair also served his time.

Telfair also noted he "couldn’t imagine how Combs felt" considering the lifestyle he grew accustomed to after his rise to fame. However, the former pro basketball player said he believes this period of adjustment could prove beneficial for the Grammy Award winner.

In October 2021, Telfair was among 18 former NBA players charged with defrauding the league’s health care and welfare benefits plan in a scheme investigators said involved claiming fraudulent medical expenses.

Several years earlier, in April 2019, the former Portland Trail Blazers guard was convicted on one count of second-degree criminal possession of a weapon. The conviction stemmed from a January 2017 arrest.

The 40-year-old Telfair is now turning his attention to Ice Cube’s 3-on-3 basketball league, the Big3.

"No one knows this yet, but the contract is signed," he said. "I’m coming for the MVP."

Follow Fox News Digital’s sports coverage on X, and subscribe to the Fox News Sports Huddle newsletter.