It appears Prince Louis kept his promise to his mother Princess Kate (Image: Getty)
kept a huge secret from his sister ahead of the earlier this month.
revealed that the young prince had resisted the urge to tell his older sister about one of the special acts set to appear, to allow her to be surprised at the
The service took place on December 6 at Westminster Abbey and saw the and special guests in attendance at biggest public appearance since her cancer ordeal.
Speaking to Paloma Faith, Kate revealed that she had asked the young prince: “Can you keep a secret otherwise it won’t be a surprise for , who loves her ballet dancing.”
Kate proudly declared that the young prince had lived up to the covert task.
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Princess Kate asked her youngest son not to tell his sister about a special performance (Image: Getty)
The princess added: “He has kept the secret for, what, nearly two weeks now.”
Despite keeping the news under his hat, Kate revealed that nearly gave in at the last minute.
The Princess of Wales added: “And then this morning he said ‘Mummy, please can I tell her – I’m bursting’.
“I did drop off and he really wanted to tell her. I think – hopefully – he’s kept it.”
But it appears from the princess’s reaction that the young prince kept to his word, as looked overjoyed at the Royal Ballet’s performance.
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Kate revealed the secret whilst talking to singer Paloma Faith (Image: Getty)
The service saw the children sing Christmas songs and hold candles whilst surrounded by family members, including and
Swimming star whilst six-time Olympic gold medallist was present following his announcement that he is terminally ill with cancer.
“Love is the light that can shine bright, even in our darkest times,” Kate wrote in a letter to the 1,600 guests invited to the Westminster Abbey concert on Friday.
It highlights the themes of her Together at Christmas Carol Service, which are kindness, love, empathy, and being there for each other through tough times.