Queen Elizabeth II learned an important lesson from Princess Diana.

According to Amanda Harding, Princess Diana and Her Majesty's relationship was always tense because of their differences. The royals were dignified and reserved, while the late Princess of Wales was compassionate and effusive. While the royals keep a distance from the commoners, Princess Diana came down to their level.

However, following Princess Diana's tragic death, there was a huge change in the monarchy. The Queen was questioned for remaining silent. The Sun published a report with a headline that read: "Where is our Queen? Where is the flag?"

In response to this, the Queen gave a surprisingly heartfelt speech in public on Sept. 5, 1997. "What I say to you now, as your Queen and as a grandmother, I say from my heart. First, I want to pay tribute to Diana myself. She was an exceptional and gifted human being. In good times and bad, she never lost her capacity to smile and laugh, nor to inspire others with her warmth and kindness," the Queen said.

"I admired and respected her — for her energy and commitment to others, and especially for her devotion to her two boys. This week at Balmoral, we have all been trying to help William and Harry come to terms with the devastating loss that they and the rest of us have suffered. No one who knew Diana will ever forget her. Millions of others who never met her, but felt they knew her, will remember her," she continued.

The royal family was never the same again after the incident. The British monarchy became more relatable, which pleased the people. In fact, in 2017, following the Grenfell Tower, the Queen visited the residents and showed them how much she cares.

"The Queen looked like she had so much compassion when she was listening to me. We could talk to her. No-one was being blocked off by police. The Queen showed she cared," a 17-year-old survivor named Rhianna Levi said.

"It all started with Diana's legacy and will continue as long as her memory stays alive," Harding wrote.

According to Ingrid Seward in her book "The Queen & Di," the Queen and Prince Charles were awake when they learned about the accident. They were restless waiting for updates about the People's Princess until they received the devastating news that Princess Diana died.

In related news, Princess Diana had tons of letters to Queen Elizabeth II. However, Princess Margaret reportedly burned it "because they were so private" to protect the members of the royal family.

Queen Elizabeth II
Queen Elizabeth II learned a lesson from Princess Diana. Pictured: 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