Princess of Wales revealed she asked Louis to 'keep a big secret' - as he delights royal watchers with cheeky expression at carol concert Kate was joined by her husband and their three children to host her Together At Christmas carol service.
While seeming to talk about the soloists from the Royal Ballet who performed during the service, Kate said that she had enlisted Prince Louis, six, to keep it a surprise for her daughter Princess Charlotte, nine.
The Princess of Wales today revealed that she asked her youngest son to keep a big secret from his sister, Princess Charlotte.
When singer Paloma Faith expressed sympathy for the princess, who this year underwent chemotherapy, Kate, 42, replied: 'I didn't know this time last year it was going to be the year I've just had.'.
It is the first time the Wales family have been seen together in public since their appearance at Trooping the Colour, the King's birthday parade, in June.
