Queen Elizabeth II
Queen Elizabeth II is seen at the Chichester Theatre while visiting West Sussex on Nov. 30, 2017, in Chichester, United Kingdom. Getty Images/Stuart C. Wilson

Queen Elizabeth is the head of the royal family and seems to have a wonderful relationship with everyone in the family. However, there was a time that even she had fear over one of her extended relatives.

According to royal biographer Ingrid Seward in “The Queen and Di: The Untold Story,” the Queen was actually fearful of her daughter-in-law early on because she had so much popularity.

“There was one person she never learnt to handle,” she wrote (via Express UK). “The Queen came to fear her daughter-in-law.”

She went on to write that a member of the household claimed Queen Elizabeth was “petrified” of Diana and fearful of her “popularity.”

However, that fear apparently didn’t last long, as Seward also previously revealed that in private, when Diana would break down to the Queen, it filled the monarch with dread about having to meet with her.

“The Queen came to dread these meetings with her daughter-in-law,” she said. “They left her feeling drained and despondent and confused—an uncommon state for a woman accustomed to the certainties of her position.”

However, even if she felt “drained” by the Princess, who went on to divorce Prince Charles in 1996, one year before her death, even Queen Elizabeth acknowledged the sadness of her passing after the 1997 accident that killed her, and while the public felt her lack of public reaction was a sign she wasn’t upset about her death, it was later revealed that she was really trying to keep her focus on protecting her grandsons, Prince William and Prince Harry.

“She was being a proper granny,” her cousin, Margaret Rhodes, revealed in 2012. “What was the point of bringing the boys down to sit in London with nothing to do but sit there feeling sad about mom? Personally, I think I would have behaved in the same way.”