Princess Kate and Princess Charlotte surprised everyone watching the Princess of Wales’s Christmas Carol Concert on Christmas Eve with a poignant piano duet, including the classical music composer responsible for the song. Erland Cooper, the 41-year-old Scottish composer who wrote “Holm Sound,” told BBC Breakfast that “it was a big surprise.”

Princess Charlotte stopped for a selfie during the royal family's Christmas Day outing and had the best response when her father, Prince William, called for her.

Princess Kate's 10-year-old daughter, Princess Charlotte, played the piano at her mother's side in a pre-recorded portion of the televised concert at Westminster Abbey. The royal duo performed "Holm Sound" by Erland Cooper during "Royal Carols: Together at Christmas."

Princess Charlotte joined Princess Kate for a royal duet on Christmas Eve as part of the special "Royal Carols: Together at Christmas."

Princess Anne was taken aback by a fan during her annual walkabout at Sandringham and was touched at the sentimental message behind the gift she was given, which was inspired by her mother, Queen Eliz

After Princess Charlotte took selfies with fans during the royals’ annual Christmas Day outing, Prince William gently encouraged her to keep up with the rest of the family.

The Royal House shared images of the Princess of Asturias at the helm of the Pilatus PC-21 after completing its first flight at the General Air Academy.

It’s always intimidating to spend the first Christmas after getting married with one’s in-laws—but imagine if your in-laws were the royal family.