He polished silver for kings, poured tea for queens, and stood quietly in the shadows as royal dramas played out — but now, one witness to the Windsors’ most private moments is pulling back the curtain.

Former Buckingham Palace butler Grant Harrold reveals Prince Philip’s searing four-word verdict on Prince Harry’s wedding to Meghan Markle, why King Charles will never again trust him and William’s plan to modernize the monarchy in his bombshell new book, “The Royal Butler.”

“The king doesn’t trust Harry, because of what Harry has said. He worried that he would use it to his advantage. And he has,” Harrold told Page Six.

“He’s done what household members typically do and spilled the beans. It’s a big thing for the family to have one of their own do this.

“They were all so close, an

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