Prince Harry and Prince William may never again have the close relationship they once had.

Royal author Angela Levin recently told Us Weekly that it will be difficult for the brothers to restore those bonds after facing several obstacles in recent years.

"I don’t think they could ever have the same closeness that they had before," Levin said. "Prince Harry told me that William was the only person he could really trust, and the only person he could say anything to because of their unique experience of losing a mother."

"They have a lot in common, although they’re very different personalities," Levin said. "But I think it’s gone too far."

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Princes Harry (left) and William have faced obstacles within their relationship.

Princes Harry (left) and William have faced obstacles within their relationship. (Getty)

Levin, a veteran journalist on royal affairs, published a book in 2018 titled "Harry: A Biography of a Prince," which was based on her exclusive conversations with the 36-year-old at Kensington Palace before his May 2018 royal wedding to Meghan Markle.

On March 7, CBS aired a two-hour interview that the Duke and Duchess of Sussex did with Oprah Winfrey, 67. During the televised sit-down, Harry revealed that his relationships with his father, Prince Charles, 72, as well as William, 38, have ruptured.

Markle, 39, described feeling so isolated and miserable inside the royal family that she had suicidal thoughts. The Duchess of Sussex also alleged that a member of the royal family had "concerns" about the color of her unborn child’s skin.

The family member was not Queen Elizabeth II, 94, or Prince Philip, 99, according to Harry, sparking a flurry of speculation about who it could be.

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This image provided by Harpo Productions shows Prince Harry, from left, and Meghan, The Duchess of Sussex, in conversation with Oprah Winfrey.

This image provided by Harpo Productions shows Prince Harry, from left, and Meghan, The Duchess of Sussex, in conversation with Oprah Winfrey. (AP)

Harry also told Winfrey the royal family cut him off financially at the start of 2020 after announcing plans to step back from his roles. But he was able to afford security for his family because of the money his late mother Princess Diana left behind.

According to Levin, William is still upset over things that were said about his wife, Kate Middleton, during the tell-all, which was viewed by nearly 50 million people globally. She also said William, who is second in line to the throne, is "hurt" by allegations of racism made towards his family.

"He’s out there with a dark cloud hanging over him, as is Prince Charles," Levin told the outlet.

Levin pointed out that their positions as senior members of the royal family don’t allow them to publicly respond to the allegations.

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Prince Charles has stayed silent about the allegations. Royal author Angela Levin claimed his position as a senior member of the British royal family prevents him from responding.

Prince Charles has stayed silent about the allegations. Royal author Angela Levin claimed his position as a senior member of the British royal family prevents him from responding. (Getty)

After the interview aired, Charles was questioned by a reporter about the interview during a visit to a vaccine clinic in London but remained silent. When William was approached during a visit to an East London School, he declared, "We’re very much not a racist family."

Thirty-six hours after the interview aired in the U.S., Buckingham Palace issued a statement.

"The whole family is saddened to learn the full extent of how challenging the last few years have been for Harry and Meghan," the statement said. "The issues raised, particularly that of race, are concerning.  While some recollections may vary, they are taken very seriously and will be addressed by the family privately."

"Harry, Meghan and Archie will always be much loved family members," the statement concluded.

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During a visit to a school in London, Prince William told reporters his family isn't racist.

During a visit to a school in London, Prince William told reporters his family isn't racist. (AP)

Representatives for the Duke and Duchess of Sussex had no comment when reached by Fox News.

Rumors of a feud between the brothers first came to light in 2019. At the time, royal author and Vanity Fair correspondent Katie Nicholl claimed that after Markle and Harry announced their engagement in 2017, William grew increasingly worried for his younger sibling and his whirlwind romance with the American actress.

A similar claim was made in the bombshell book "Finding Freedom."

"William was quite concerned that the relationship had moved so quickly," Nicholl claimed in the TLC documentary "Kate V. Meghan: Princesses at War?" "And being close to Harry, you know, probably the only person close enough to say to Harry, ‘This seems to be moving quickly. Are you sure?’ And I think what was meant as well-intended brotherly advice just riled Harry."

"Harry is hugely protective of Meghan," Nicholl continued. "He saw that as criticism, he interpreted that as his brother not really being behind this marriage, this union. And I don’t think things have been quite right ever since."

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Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Charles, Prince of Wales attend the Commonwealth Day Service 2020 on March 9, 2020, in London, England. 

Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Charles, Prince of Wales attend the Commonwealth Day Service 2020 on March 9, 2020, in London, England.  (Photo by Phil Harris - WPA Pool/Getty Images)

Harry hinted at a rift with his older brother in ITV’s 2019 documentary "Harry & Meghan: An African Journey."

"Part of this role and part of this job, this family, being under the pressure that it’s under, inevitably stuff happens," he said at the time. "But look, we’re brothers, we’ll always be brothers. We’re certainly on different paths at the moment, but I’ll always be there for him and I know he’ll always be there for me."

During the interview with Winfrey, Harry said he will "always be there" for his brother despite their difference.

"I love William to bits," Harry said. "He's my brother. We've been through hell together. But we are on different paths."

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FILE - In this July 23, 2019 file photo, Britain's Prince Harry delivers a speech as he attends Dr Jane Goodall's Roots & Shoots Global Leadership Meeting at St. George's House, Windsor Castle in England. The eco-minded Prince Harry announces a massive travel sustainability initiative in partnership with key service providers that’s aimed at bettering the practices of the global industry amid an ever-increasing number of travelers. The Duke of Sussex announced Travalyst at a news conference Tuesday, Sept. 3, in Amsterdam, a city hit hard by over-tourism. He was joined by his partners, including Visa, TripAdvisor and Booking.com.(AP Photo/Kirsty Wigglesworth, Pool)

Prince Harry told Oprah Winfrey that he hopes his relationship with Prince William will improve with time. (AP)

When asked by Winfrey how he would describe the relationship now, Harry said, "Time heals all things, hopefully."

After Harry and Markle married in May 2018 at Windsor Castle, the royal family seemed to welcome the Duchess of Sussex, a glamorous former TV star. The pair were seen as providing a fresh young face for the monarchy of an increasingly multicultural nation.

It didn’t take long for the fairy tale to unravel. 

The couple stepped away from royal duties last year and eventually settled in California, saying they wanted to escape racist coverage and unwanted intrusions on their privacy by the British media.

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The Duke and Duchess of Sussex currently reside in California with their son Archie.

The Duke and Duchess of Sussex currently reside in California with their son Archie. (Getty)

During the interview, the duke and duchess shared they are expecting a girl due this summer.

The Associated Press contributed to this report.