Former U.S. President Joe Biden’s prostate cancer has spread to other parts of his body and is causing him significant pain, his son Hunter Biden has said.

In an emotional and wide-ranging interview with the BBC broadcast late Friday, Hunter Biden spoke about his 83-year-old father’s health, saying the cancer has metastasized to his bones and beyond.

“It’s very painful and it’s very debilitating in many respects,” Hunter Biden said, describing the situation as deeply difficult for the family.

Joe Biden, who was the oldest person to serve as president of the United States, faced persistent concerns about his age and health during his four years in office. His administration and advisers also came under criticism over allegations that the extent of his health problems had not been fully disclosed.

Those concerns intensified after Biden ended his 2024 reelection campaign following a widely criticized debate performance against Donald Trump, who later succeeded him as president.

Biden disclosed his prostate cancer diagnosis in May 2025, less than four months after leaving the White House.

Hunter Biden said the diagnosis had been particularly difficult for the family and expressed concern about his father’s condition.

“It’s really sad to watch,” he said, adding that he wished his father would complain more about his health because “it’s not good.”

Despite his illness, however, Joe Biden continues to speak publicly about issues he considers important, his son said.

“He’s still doing his thing,” Hunter Biden said. “He so believes in this country.”

The former president is also set to publish a memoir titled “Promise Me, America” following the 2026 midterm elections.