ARCHIE and Lilibet could one day get called into action as the Royal Family “is hanging on by a thread”, an expert claims.

Prince Harry’s children now call the US home, but they can’t be denied their connection to Britain and the monarchy.

And royal expert Phil Dampier says this is something that may come into effect as the years go on.

In recent months other royals have been asked to step up when King Charles and Princess Kate were out of action – and their spouses cared for them.

One expert said Princess Anne was the “glue” holding the Royal Family together, as she was called in to take the reigns at times.

And while the King is now “supercharging” his schedule as he returns to his royal duties, Phil said this may not be the last time members are pulled up.

Speaking to royal editor Matt Wilkinson for The Sun’s Royal Exclusive Show, the commentator said the Firm is “hanging on by a thread”.

He said this could see Archie, five, and Lilibet, who turns three tomorrow, called in to help.

Phil added that as they children get older, they may start quizzing their parents on why they don’t have a relationship with their dad’s side of the family.

The expert told the show: “The fact they are still seventh and eighth in line to the thrown is quite extraordinary really and you never know one day they might be called into action.

“They might move up the scale.

“It’s all hanging a bit by a thread and I think when they get older they’re going to start asking questions and say ‘how did it come to this? That we haven’t got a relationship with our grandparents or the Royal Family’.”

Earlier this year another expert spoke about how other royals had to step up while the King and Kate were out action.

Both key royals were currently absent from their duties – with Prince William also taking a step back to care for his wife and kids, Prince George, Princess Charlotte, and Prince Louis.

With three major firm members “falling off the top”” this week”, people were questioning who will show up for engagements.

When the King ascended to the throne, he made Princess Anne and King Edward councillors of state – replacing Prince Harry and Andrew after they stepped down from their working posts.

Councillors of state are picked to carry out duties on behalf of the King if he is ever ill or abroad.

Princess Anne was then dubbed as the glue holding the family together during this time while Camilla and Wills take care of their spouses.

Royal expert and author Angela Levin has told The Sun that it’s a “very very difficult” time for the family and Anne’s hard-working nature is needed.

She said: “I find it extremely worrying because in a way the Royal Family is a connection to your own family, you know how they progress, you know when a baby has arrived.

“To see three of them fall off the top is very very difficult.

“The late Queen always felt she had to be seen to be believed and if you can’t see the three people at the top it’s difficult.

“You feel very disjointed from it all.

“I was very concerned that maybe Harry would be next in charge to stand in for the King, this is what I always hoped would never happen.

“You can rely on Princess Anne 100 per cent. She would work extremely hard.

“Edward and his wife would also do a lot but I don’t think the King will be out for long.

“Camilla has already said he can’t wait to get back to work.”