Former US President Joe Biden's prostate cancer has spread beyond his bones and is ​very painful, his son, Hunter Biden, said in ‌an interview with the BBC.

“The cancer has spread, metastasised into his bones and further,” Hunter Biden told ​BBC's "Newsnight," according to video posted online on ​Friday. “It’s very painful and it’s very debilitating ⁠in many respects.”

A spokesman for the 83-year-old Democrat declined ​on Saturday to comment on Hunter Biden's ​interview.

Biden revealed in May 2025, less than four months after he left the White House, that he had ​been diagnosed with an "aggressive form" of prostate ​cancer, saying at the time that it had spread to ‌his ⁠bones.

A Biden spokesman said in October he was undergoing radiation treatment and hormone therapy.

Biden was the oldest person to win the U.S. presidency ​at the ​time of ⁠his election in 2020.

Biden's physical health and mental acuity drew scrutiny during ​his 2021 to 2025 presidency.

Biden attended ​the ⁠dedication of Barack Obama's presidential library in June in Chicago. Biden served as Obama's vice ⁠president ​from 2009 to 2017.

Biden's presidential ​memoir is scheduled for release on November 17.

-Reuters