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But as a result of many of the storylines, Camilla, Duchess of Cornwall, has been subject to some upsetting online abuse from viewers who watched the show.
Much of Season 4 focussed on Prince Charles and Camilla's relationship while the future king was married to Diana. However, many have questioned how much of what is portrayed on the TV show is actually fact, as opposed to fiction.
In fact, some historians have pointed out that Charles and Camilla had little contact in the five years after the Prince and Princess of Wales were married.
But since the show aired, both cast and crew of the royal drama have defended the storylines, reminding viewers that the drama is fiction.
Despite this, some viewers have taken to social media to post some upsetting comments about the Duchess of Cornwall.
Under a photo of Camilla, 73, on the Royal Family's Instagram page, one person wrote: "I watched The Crown, I don't like you."
Hundreds took to the photo writing "Princess Diana forever" while another said: "I understand it was a long time ago but honestly, I am upset that Camilla was a married woman and Charles was married to Diana but they disregarded their spouses completely and now they are praised as a happily ever after future King and Queen."
Meanwhile another wrote: "Where's the dislike button???"
Defending some of the fictional aspects of the show, Josh O'Connor (who played Charles) said: "Ultimately what The Crown survives on is the understanding that the audience have the intrigue and understanding that this is fiction.
"It is always tricky but you don't want it to be ruffling feathers, you want to be clear as possible that this is Peter Morgan's imagination and his world being created."
Meanwhile, in one scene, Peter admitted he "made up" a conversation between Prince Charles and his great uncle Lord Mountbatten - also referred to as Dickie.
In one episode, Lord Mountbatten (played by Charles Dance) slams Charles for pursuing his relationship with Camilla, who was married to Andrew Parker Bowles at the time.
The pair have a tense phone call, before Lord Mountbatten pens Charles a letter. While no record of the letter actually exists, Peter Morgan has defended his decision to create the conversation, insisting that it is a reflection of the truth.
Speaking on The Crown's podcast, he said: "What we know is that Mountbatten was really responsible for taking Charles to one side at precisely this point and saying, 'look, you know, enough already with playing the field, it's time you got married and it's time you provided an heir'.
"As the heir I think there was some concern that he should settle down, marry the appropriate person and get on with it.
"In my own head I thought that would have even greater impact on Charles if it were to come post-mortem, as it were. I think everything that's in that letter that Mountbatten writes to Charles is what I really believe, based on everything I've read and people I've spoken to, that represents his view.
"We will never know if it was put into a letter, and we will never know if Charles got that letter before or after Mountbatten's death, but in this particular drama, this is how I decided to deal with it."
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