Spencer will dramatise the critical weekend when Diana made the decision to leave Prince Charles. However, it's not just royal fans who are up in arms about the unusual casting - as thousands of people have taken to social media to express their confusion: "Plenty of British actresses who would have been better for this role.
Princess Diana was classy, Kristen is not. They don't even look alike," one person tweeted, while another wote: "Kristen Stewart playing Princess Diana is wrong on so many levels." Chilean director, Pablo Larraín who directed the 2016 Jackie Kennedy biopic, Jackie remains loyal to his decision and defends the American Twilight star: "Kristin is one of the greatest actors around today," he tells Deadline.
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