Prince William is reportedly still trying to make sense of his younger brother’s decision to step back as a senior member of the British royal family.

Since making their bombshell announcement earlier this year, Prince Harry and his wife Meghan Markle have relocated to the “Suits” star’s native Los Angeles with their son Archie, 1.

“William is so tired and done with the drama of it all,” a royal source told Us Weekly on Wednesday.

“It breaks William’s heart,” claimed the palace insider of the couple’s move, adding the brothers will need “space and time to breathe” before their relationship can heal.

“Hopefully, they’ll work it out,” said the source.

Earlier this month, another insider told the outlet that the Duke of Cambridge, 38, and his younger sibling, 35, have been in touch since the move.

MEGHAN MARKLE WAS NICKNAMED 'DUCHESS OF DIFFICULT' BY PALACE AIDES FOR BEING 'DIFFERENT,' ROYAL EXPERT CLAIMS

Britain's Prince Harry (left) and older brother Prince William. (Photo by Tolga Akmen - WPA Pool / Getty Images)

PRINCE WILLIAM ‘HAS FORGIVEN’ HIS FATHER PRINCE CHARLES ‘FOR THE MISTAKES OF THE PAST,’ ROYAL EXPERT CLAIMS

“William’s advised Harry to return to London or move elsewhere, somewhere safer,” claimed the source. “He’s concerned about his brother’s well-being and safety.”

The claims come just days after Robert Lacey said he has been “astonished” by what he has uncovered in his upcoming book about the brothers.

The author, who also serves as historical consultant to the hit Netflix series “The Crown,” is releasing a new book in October titled “Battle of Brothers: William and Harry – The Friendship and the Feuds,” which addresses "the unique and complex relationship at the heart of the royal family’s recent woes,” People magazine reported on Monday.

The book will also put the two brothers' relationship into a historical context, exploring how the “heir” and the “spare” have impacted the British monarchy over the years.

“Much reported on but little understood, Diana’s boys have lived under constant scrutiny since birth,” reads the book’s synopsis, as revealed by the outlet.

PRINCE WILLIAM, PRINCE HARRY’S ‘DEVASTATING BREAKDOWN’ REVEALED IN NEW BOOK: ‘I HAVE BEEN ASTONISHED’

LONDON, ENGLAND - MARCH 09: 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) (Photo by Phil Harris - WPA Pool/Getty Images)

PRINCE WILLIAM SAYS HE’S ‘WORRIED ABOUT THE WAISTLINE’ AFTER KEEPING BUSY BAKING DURING QUARANTINE

“Raised to be the closest of brothers, the last 18 months have been a devastating breakdown of their once unbreakable bond,” it continued. “With an unrivaled knowledge of court life and access to impeccable sources, Robert Lacey investigates the untold reality of the brothers’ relationship, explaining what happened when two sons were raised for vastly different futures and showing how the seeds of damage were sown as their parents’ marriage unraveled.”

According to the outlet, the book also looks into how the relationship between the siblings has been impacted by their wives Kate Middleton and Markle.

“I have been astonished and sometimes moved to tears by the fresh details and insights I have discovered in researching this story of family conflict,” Lacey said in a press release. “It has been both enthralling and painful to trace this drama through the memories of close witnesses and some of the people most intimately involved.”

“These two brothers – once inseparable and now separated by much more than mere distance – have been acting out the contradictions that go back into their childhoods and even before that: into their parents’ ill-fated marriage,” he continued. “We have seen conflicts between heir and spare in every recent generation of the royal family — but nothing so profound as this.”

ROYAL INSIDERS REACT TO KRISTEN STEWART'S 'OUT OF TUNE' CASTING AS PRINCESS DIANA

Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend The Endeavour Fund Awards at Mansion House on March 05, 2020, in London, England.  (Photo by Karwai Tang/WireImage/Getty)

PRINCE HARRY REVEALS FEARS OF PROVIDING SON ARCHIE A FUTURE HE 'DESERVES'

Rumors of an alleged royal feud came to light in 2019, when British bestselling author Katie Nicholl claimed that since Markle, 38 and Harry announced their engagement in 2017, William grew increasingly worried for his brother and his whirlwind romance with the American actress.

“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.”

Harry hinted at an alleged rift with his older brother in last year’s ITV 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.”