Charles Spencer’s memoir: King Charles, Princess Diana and more bombshells

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Add Page Six on Google Charles Spencer is spilling the royal tea.

Princess Diana’s younger brother’s book, “Swan Song: Diana, My Sister” is out today, in which he makes multiple bombshell claims about the royal family — particularly, about King Charles III’s allegedly callous treatment of his ex-wife and how he reacted to her tragic death.

Before the book’s release, Charles released a harsh statement about the tome, saying that grief had clouded Spencer’s judgment and memory.

“His Majesty is mindful that the pain of fraternal grief can cloud reason, affect judgment and color memory in ways others do not recognize, even many years after such a loss,” a rep told Page Six.

Read on for the biggest bombshells in Spencer’s book.