baby prince william with his nanny Barbra barnes
Getty Images | David Levenson

New Tell-All Book Claims Prince William Told His Nanny He'd 'Punish' Her When He Is King

Kids — they say the darndest things, don't they? Well, some kids have a lot more power than other kids. If you're a child who has been reminded since birth that you will one day be the King of England, you surely have a lot more bragging rights than the average toddler at the sandbox.

In a new tell-all book about the Royal Family, author Tina Brown gets into detail about Prince William as a child, and how the Queen felt about her cheeky grandson.

If there's one thing I love, it's a tell-all book about the royals.

Giphy | HULU

While it's been a minute since one of any substance came out, author and journalist Tina Brown is here to change all of that with her new book, "The Palace Papers."

As reported by "Page Six" Tina's book goes into detail about Prince William's childhood like never before.

According to Tina, HM Queen Elizabeth was not impressed with her grandson and complained to her husband, the late Prince Philip, that the future king was "out of control."

"She was not amused that he loved to say, 'When I am king, I’m going to make a new rule that…,'" she writes.

prince william
Giphy | Bustle

Tina reports that Diana once referred to her son as a "holy terror" after returning from a royal tour of Canada in 1983.

"By the time he was four, he had the unattractive habit of yapping at his nanny, Barbara Barnes, 'No one tells me what to do! When I am king I will have you punished.'"

prince william with his nanny
Getty Images | David Levenson

However, as the young Prince grew up, Tina claims he became his mother's close confidant.

Tina writes that after one particularly bad fight between his parents, William pushed tissues under the door of Diana's bathroom saying, "I hate to see you sad."

prince william and prince harry waving at the crowd
Giphy | BBC

“William understood Diana more (than Harry), but idealized her less,” Tina writes.

"He was privy to her volatile love life," she continued. "He knew the tabloids made her life hell, but he also knew she colluded with them."

princess diana and her young sons prince william and prince harry
Getty Images | Tim Graham

It's interesting to see what kind of son Prince William grew into, and I'm glad he was there for his mother when she needed him.

"The Palace Papers" is available for purchase now.

h/t: Page Six