'Our family': Princess Eugenie expresses regret after she and Princess Beatrice miss Princess of Wales' Christmas carol service

Princess Eugenie, the daughter of Andrew Mountbatten Windsor and Sarah 'Fergie' Ferguson, shared a rare message after missing a significant royal event.

Catherine, Princess of Wales, held her Together at Christmas carol service overnight, which was attended by several members of the royal family and some other big-name stars but Eugenie and her sister Princess Beatrice weren't there.

Sharing a heartfelt message to her Instagram stories, Eugenie revealed that she wished she and her sister could have been there.

"Wish Bea and I could have been celebrating tonight with our family," she wrote.

"Wishing [the Prince and Princess of Wales] such a special evening at her incredible carol service.

"What an amazing message of love and hope."

She shared her message along with a post from Catherine and Prince William's official Instagram which included a program from the carols service.

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Beatrice and Eugenie have attended Catherine's esteemed Christmas event in previous years.

It is understood that the sisters were invited this year but were unable to attend due to other commitments.

"The official line from the palace is saying that they both had commitments and they'd given due notice," royal commentator Russell Meyers told Weekend Today this morning.

"But I'm told perhaps they thought that it wouldn't be a good look necessarily, would have taken the gloss off of Kate and her event tonight. So they did decide to stay away," he added, referring to their father recently losing his titles in light of his relationship with convicted sex offender Jeffrey Epstein.

"We can give them their dues for doing that because it is about the Princess of Wales it is about the Princess of Wales. It is about bringing communities together and if they had turned up then surely the story would have been about them coming to the event."

While the sisters were not present, there were plenty of other recognisable names at the event at Westminster Abbey.

Of course, Catherine was present accompanied by William, Prince of Wales and their three kids, Prince George, Princess Charlotte and Prince Louis.

The kids matched their dad in navy outfits. The boys wore navy suits while Charlotte wore a navy velvet dress with a white lace collar.

Meanwhile, Catherine wore a deep green coat with a black fur trim. She wore her hair in loose waves for the event and accessorised with snowflake-look earrings.

Sophie, Duchess of Edinburgh also joined the Wales family at the event. She attended solo without her husband Prince Edward.

Princess Anne's daughter Zara Tindall and her husband Mike Tindall were also among the royals in attendance.

Catherine's brother James Middleton and sister-in-law Alizee Thevenet were also there to support her.

A number of celebrities also attended Catherine's Christmas event in support.

Actress Kate Winslet was in attendance, wearing a festive red suit for the occasion. She gave a speech for the audience.

Actor Chiwetel Ejiofor was also among the celebrities in attendance, opting for a brown fur-look coat.

Actress and singer Hannah Waddingham also opted for red for the occasion. She paired her red gown with a white coat.

Schitts Creek star Eugene Levy also attended the event.

Levy recently spent some time with Prince William, filming an episode of his show The Reluctant Traveler with the future King.

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