Kate Middleton is spreading Christmas cheer to the families who need it most.

The Princess of Wales invited survivors and the relatives of victims of the stabbing attack on a Taylor Swift-themed dance class in Southport, England, to her upcoming carol service.

The royal family have been a tremendous support to the families, a royal source told the Sun Friday. King [Charles III] met the survivors, then Kate took time out to meet them in private last month with Prince William.

The insider said Middleton, 42, personally ensured that everyone affected by the tragic event would be invited to Together at Christmas, which will mean more to her than ever before.

It promises to be an incredible, life-affirming night, and theres been a lot of organization involved to get it all ready, the source added of the Dec. 6 event at Westminster Abbey.

The families and survivors will be treated to three days in London.

Transportation and accommodations are being covered by Southport Stronger Together, a charity founded to benefit those affected by the tragedy.

The families have met the king, met Taylor Swift, and now this wonderful concert  but it is all unbearably tinged with the trauma they are still dealing with, the source told the Sun.

It has been a horrendous time for them, and none of the children or the adults who were in that room will ever be the same again.

Three young girls were killed and 10 other people were injured in the July 29 attack during the Taylor Swift Yoga and Dance Workshop in Southport, which is located approximately four hours away from London.

Axel Rudakubana, 18, was arrested and charged with three counts of murder and 10 counts of attempted murder. His motive remains unknown.

The horror of yesterdays attack in Southport is washing over me continuously and Im just completely in shock, Swift, 34, wrote on her Instagram Story a day after the horror unfolded.