Princess Kate's incredible gesture revealed ahead of next major public appearance

Kate smiling in green coat and gold earrings
Kate has donated a Christmas tree to a children's charity (Getty)

The Princess of Wales has brought joy to one charity as the festive season kicks off.

Kate, who is set to make two major public appearances this week, has donated a Christmas tree to TAG Youth, which which delivers a programme of personal, social and educational opportunities to young people with disabilities.

The heartfelt gesture was revealed by the charity's Instagram account over the weekend, with TAG Youth sharing in the caption: "We are pleased to share that we will be receiving a Christmas Tree from HRH The Princess of Wales. 

"We will be taking delivery of the tree in a few days and young people will have the opportunity to help decorate the tree."

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It comes ahead of the Princess taking part in the Qatar state visit on Tuesday and hosting her annual Christmas carol service at Westminster Abbey on Friday.

HELLO! understands that as in previous years, trees from Great Windsor Park which are used inside Abbey at the carol service are donated to charities across London, to ensure they can be reused.

This year, TAG Youth have been nominated as a charity to receive a tree following the carol service on Friday.

Kate Middleton inside Westminster Abbey
One of the Christmas trees inside the Abbey, as seen last year, will be donated to charity (Getty)

It comes after Kensington Palace shared the moving message each guest at the event will receive from the Princess.

Kate has written a letter for the 1,600 carol goers, including members of the royal family, telling them "Love is the light that can shine bright, even in our darkest times".

Her message, featured with the order of service for the event, in part read: "This Carol Service is a heartfelt celebration of every one of you, and a reminder that at Christmas, and throughout the year, we must all shine for each other.

“Because in times of joy and sadness, we are all each other's light."

The Princess is making a gradual return to her public duties after being treated for cancer, while the King is still under the care of cancer specialists.

Kate is expected to be joined by her husband, the Prince of Wales, and their three children at the service, as well as members of the royal family and the Middletons.

And ahead of the state visit, Kensington Palace has confirmed Kate will join Prince William as the King hosts Sheikh Tamim bin Hamad Al Thani and the first of his three wives, Sheikha Jawaher at Buckingham Palace for lunch.

Kate Middleton looks on from a balcony
Kate was last seen publicly on Remembrance Sunday (Getty)

The Prince and Princess of Wales will first greet the Emir at Kensington Palace on Tuesday morning before taking part in a carriage procession to Horse Guards parade for the ceremonial welcome.

However, Kate will not attend the grand state banquet hosted by the King in Buckingham Palace's ballroom that evening.