However, a royal expert has shared two upcoming occasions that Kate Middleton could attend in the last few months of the year.
Despite taking a step back from royal duties, Princess Kate, 43, attended Trooping the Colour in June, and the Wimbledon Men’s Final in July.
More recently she was spotted driving to church near Balmoral with Prince William and Prince George, during their traditional annual summer break to Scotland.
Jennie, who was previously royal correspondent at the BBC, told Fabulous that we may possibly see Princess Kate on Remembrance Day in November.
She explained: “Big events, maybe such as the Cenotaph Remembrance Day service, might be something where she feels she would want to be.
“Of course, mid-November is pretty cold, and that might not be good for her.
“I don’t know, but I think big set-piece occasions like that are where we might see her.
“I’m hopeful we might see her on Christmas Day at Sandringham.”
Jennie pointed out the recent sighting of Kate at Balmoral, and added: “The natural progression would be for them to be together at Sandringham on Christmas Day.”
The royal expert said if Kate was to step out at Christmas, it would be “complete symmetry”.
Last Christmas Kate hosted her Together at Christmas carol service and did a walkabout on December 25.
It was the last time we saw the royal mum-of-three before she announced she was having planned abdominal surgery in January.
This was followed by Kate announcing in March that she was having preventative cancer treatment.
Jennie added: “That will be a sort of complete symmetry, I suppose, in that the last time the public were able to get up close to her and greet her face to face was last Christmas at Sandringham.
“Then there was the shock news just a little while after that that she’d had the operation, and then we talked about the cancer.
“So there would be a certain symmetry to her appearing at Sandringham and doing that walk back to Sandringham House after going to church, and people being able to express their real affection and love for her face to face.
“So fingers crossed that might happen.”
Jennie added that it will be “lovely when we see Catherine back” but she hoped that the royal is taking the time she needs to recover.
She added: “I hope she’s not feeling guilty about her prolonged absence from the public stage, because I think, and I hope, she understands that the vast majority of the public completely get it.