Even after Princess Diana passed away, she remains as one of the most beloved members of the royal family. She shares this trait with her former mother in law, Queen Elizabeth II, although they do not necessarily have the same style of dealing with the public and the media.

Even before being married to Prince Charles, it was reported that Princess Diana had her way of doing things, breaking royal protocols like when she ordered her engagement ring from a catalog instead of having it custom made out of tradition. She also omitted the word "obey" from her vows when she got married to Prince Charles, something unheard of before the Princess did it, Good Housekeeping reported.

Queen Elizabeth has always been traditional in the sense that she kept details about the royal family private. For the most part, Princess Diana abided by this principle and performed her royal duties. However, the late princess finally showed some cracks when her marriage with Prince Charles started to collapse.

The Queen was reportedly shocked when Andrew Morton's book Diana: Her True Story came out, detailing Diana's life inside the palace, her relationship with her in-laws and her marriage.

The Queen also disapproved of Diana going public with an interview on BBC in 1995 where she detailed the private details of her troubled marriage.

However, this also opened Queen Elizabeth's eyes to Diana's anguish and was reportedly the reason that she finally wrote a letter to her daughter in law and Prince Charles to get a divorce and end their misery.

While they did not always have the same way of looking at things, it was said that Queen Elizabeth has been very supportive of Princess Diana, especially as she first started navigating her life as a royal. However, when she tried to seek advice about marital troubles, the Queen was not of much help.

Still, the Queen had a lot of admiration for her former daughter in law, and personally paid her respects to her former daughter in law when she died, BBC reported.

"I want to pay tribute to Diana myself. She was an exceptional and gifted human being. In good times and in bad, she never lost her capacity to smile and laugh, nor to inspire others with her warmth and kindness. I admired and respected her - for her energy and commitment to others, and especially for her devotion to her two boys," she said.