"At the same time, I understand why people would be upset because this is history. And with Diana it's still very much fresh."
Emma insisted she and her co-stars just approach the show as simply playing "characters" and they "would rather not think about" the real people behind the stories.
She said: "I suppose, we approach these people that we play as characters which is why its such a joyous job because Peter writes such rich and complex characters.
"Like the rest of the cast, I would kind of would rather not think about it. It's so tricky because, as you said, there is so much pain still left with everything surrounding Diana.
"I can't imagine what it's like for them. Like Olivia [Colman] said this series is fictionalised but it all comes from a place of respect and love."
The British actress also spoke of how important it was to her to include scenes of Diana's battle with bulimia and other mental health issues.
She said: "It was something that I was very passionate about doing justice to.'
"For two reasons really, I think it's important that eating disorders and mental health are depicted and depicted properly and sensitively to really open up that conversation.
"Second of all, Diana herself opened up that conversation… she spoke very candidly about her struggles with bulimia and her mental health back in the '90s. It's still something I think we struggle to talk about today.
"Both myself and Peter Morgan felt that we wouldn't be doing her justice or her story justice if we didn't include it."
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