Prince Harry Worries About Prince William's Kids: 'At Least One Will End Up Like Me, The Spare'

Prince Harry has expressed his concerns for his nephews and niece, saying that one of them will end up like him, the "spare."

Following the release of his memoir "Spare," the Duke of Sussex revealed in an interview with The Telegraph that he "worries" about the other "spares" in the family.

"As I know full well, within my family, if it's not us," Prince Harry said, pointing to himself, "it's going to be someone else."

"And though William and I have talked about it once or twice, and he has made it very clear to me that his kids are not my responsibility, I still feel a responsibility knowing that out of those three children, at least one will end up like me, the spare. And that hurts, that worries me," he added.

His older brother Prince William, the heir to the British throne, and Kate Middleton are parents to Prince George, 9, who is second in line, Princess Charlotte, 7, and Prince Louis, 4.

Prince Harry did not mention if there was a particular child he was worried about.

In his book, Prince Harry wrote that the labels heir and spare, which were used to reference Prince William and himself growing up, affected their relationship as brothers.

"The Heir and the Spare — there was no judgment about it, but also no ambiguity. I was the shadow, the support, the Plan B," he wrote, according to Insider. "I was summoned to provide backup, distraction, diversion and, if necessary, a spare part. Kidney, perhaps. Blood transfusion. Speck of bone marrow. This was all made explicitly clear to me from the start of life's journey and regularly reinforced thereafter."

Prince Harry also claimed that his father, King Charles, referred to him as "a spare" on the day of his birth, allegedly telling his mother Princess Diana: "Wonderful! Now you've given me an heir and a spare—my work is done."

Buckingham Palace has not commented on Prince Harry's book or the claims he has made about the royal family in interviews.

On Thursday, the Prince and Princess of Wales put on a united front in their first public engagement following the release of "Spare."

Prince William and Middleton visited Merseyside in North West England, where they attended the opening of The Royal Liverpool University Hospital and then stopped by the Open Door Charity in Birkenhead.

During their second stop, Prince William and Middleton were asked by reporters about Prince Harry's book.

"Your Royal Highness, have you had a chance to read your brother's book at all? Have you had a chance to read your brother's book at all, your Royal Highness?" a person can be heard asking in a video shared via Twitter by Sky News reporter Inzamam Rashid.

However, the royal couple didn't react to the question and just walked out.

An anonymous source previously told Entertainment Tonight that the royal family felt betrayed by Prince Harry's book. The source claimed that "no one in the family trusts Harry anymore."

A second unnamed insider told ET that Middleton was "hurt and disappointed" by her brother-in-law's bombshell revelations in "Spare" because she reportedly felt that "private matters had been made public."