Prince William and Kate say they will not take part in a documentary marking the 30th anniversary of Princess Diana’s death, according to unnamed royal sources cited by the Daily Mail.

The report also says the couple will not be drawn into any public dispute related to Earl Spencer’s book, which is described as a bombshell memoir and has been serialized by the same outlet. The sources claim William and Kate will keep their thoughts private, particularly amid allegations that the book has caused further strain within the royal family, including effects attributed to King Charles.

The coverage is based on commentary from royal insiders rather than direct statements from William, Kate, or Spencer. With only one outlet providing details in the supplied material, there are no competing accounts here on whether the documentary invitation was declined, on the specific reasons given, or on the precise nature of any disagreement tied to Spencer’s memoir.