Kate Middleton shares new video with major update on her next appearance

The Princess of Wales took to Instagram to share a video containing 'exciting news' just hours after Kensington Palace gave an update on on new appearance for Kate, who has recently just finished chemotherapy treatment

The Princess of Wales has delighted royal fans by sharing a behind-the-scenes teaser video with 'exciting news'.

Kate, 42, is recovering from cancer and chemotherapy treatment, in what has been dubbed a 'brutal' year by her husband Prince William. But in a major update on her next public appearance, it seems she wants to end the year on a high. That's because Kensington Palace has confirmed Kate will host her annual Christmas carol concert this year at Westminster Abbey, which has become a firm fixture in the royals' festive diaries.

And to celebrate the news that the concert is set to take place on December 6, William and Kate's Instagram account posted a special teaser video showing early preparations for the big event. In the clip, a printing press can be seen embossing Kate's official cypher on to card ready for them to be made into invitations.

The caption reads: "Something exciting is coming... The invitations are fresh off the press for this year's Together At Christmas Carol Service, which will be returning to Westminster Abbey on Friday 6 December. We can't wait for you to join us too! Tune in on @ itv and @itvxofficial on Christmas Eve."

It comes as the Palace said Kate, who honoured the war dead at Remembrance events at the weekend, particularly wanted the theme of this year's service to celebrate those supporting others in need, with a focus on the importance of love and empathy.

Kensington Palace said: "This year's service provides a moment to reflect upon the importance of love and empathy, and how much we need each other, especially in the most difficult times of our lives. The service will shine a light on individuals from all over the UK who have shown love, kindness and empathy towards others in their communities."

The Palace added: "This year, Her Royal Highness wanted to celebrate the many people supporting those in need – individuals who have inspired, counselled, comforted, and above all else shown that love is the greatest gift we can receive. This theme takes inspiration from the Christmas story which encourages us to consider the experiences of others and the important human need of giving and receiving empathy."

It will be the fourth time Kate has staged her Together At Christmas carol service, which is supported by The Royal Foundation. The event will be filmed and broadcast as part of a special programme on ITV1 and ITVX on Christmas Eve.

Members of the royal family will gather with the princess as some 1,600 people fill the abbey in London to see musical performances by stars including Paloma Faith, Olivia Dean and Gregory Porter. Among the invited guests will be those who have supported others, either on a personal level with friends and family or through their work or volunteering.

Names have been nominated by charities associated with the royal family and by Lord Lieutenants, the King's representatives in counties across the UK. The Middleton family, who are said to have been a great source of support to Kate during her illness, usually attend, and last year Kate and William brought along Prince George, Princess Charlotte and Prince Louis.

Decorations at the abbey will be inspired by nature and the service will combine traditional and modern elements to encompass people of all faiths and none. In addition, 15 Together At Christmas community carol services will be taking place across the UK including at the Royal Cornwall Hospital in Truro and Blackpool Tower Circus.

Hosted by Lord Lieutenants and supported by The Royal Foundation, each community service will recognise those who have gone above and beyond to help others.