King Charles becomes instantly aggravated whenever he receives a phone call from his estranged son Prince Harry, according to a royal commentator.

It’s no surprise that the monarch has endured a fractured relationship with the Duke of Sussex ever since Harry and his wife, Meghan Markle, quit royal life in 2020 and moved to the US.

Despite being back on home soil several times since, Harry’s relationship with his father — as well as his brother, Prince William — has become nonexistent.

“After the brickbats, ‘truth bombs’ and accusations of Oprah, Netflix and Harry’s ‘Spare,’ he lost his older brother, strained his relationship with various members of the royal family to breaking point and left many old friends and trusted staff behind,” royal expert Emily Andrews wrote in Woman Magazine, via the Mirror.

“Now, even his own father is not taking his calls. I’m told that when courtiers bring the phone to the king, he waves them away in irritation,” she said, adding that the monarch, 75, does not own a personal phone.

“This is not because there’s been yet another falling out. Rather, it is thought to be because Harry wants to continuously discuss his ongoing battle for security, which he has been fighting in the court for four years and believes Charles has the power to reinstate.”

“Those close to Harry say the king no longer even answers his letters,” she said, adding that Harry “gets ‘unavailable right now’ and his calls go unanswered, says a friend.”

The Post has reached out to Buckingham Palace for comment.

Indeed, a close friend of the Invictus Games founder claimed in July that Harry is no longer on speaking terms with his estranged father.

Despite the father-son duo’s meeting in February during the duke’s mad dash to London following the king’s cancer diagnosis, the pair’s communication has since become nonexistent.

And while their 45-minute meetup is said to have been positive, Charles no longer takes his son’s calls or responds to his letters, according to those close to Harry.