Kristen Stewart in “Spencer”; Princess Diana.Photo: Neon; Getty

Spencer First look with Kristen Stewart as Princess Diana

01of 05Kristen Stewart in “Spencer”; Princess Diana.Neon; GettyKen Wharfe, who was Princess Diana’s bodyguard in the late 1980s and early 1990s, joined the royal family for the Christmas holiday celebrations at Sandringham that provide the backdrop for Pablo Larraín’sSpencer.“It was purgatory for her,” Wharfe tells PEOPLE in this week’s issue.

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Kristen Stewart in “Spencer”; Princess Diana.Neon; Getty

Spencer First look with Kristen Stewart as Princess Diana

Ken Wharfe, who was Princess Diana’s bodyguard in the late 1980s and early 1990s, joined the royal family for the Christmas holiday celebrations at Sandringham that provide the backdrop for Pablo Larraín’sSpencer.

“It was purgatory for her,” Wharfe tells PEOPLE in this week’s issue.

02of 05Kristen Stewart in Spencer; Princess Diana.Neon; Julian Parker/GettyAccording to Wharfe, the Princess of Wales “confined herself to spending time in the kitchen with the chef or with people like me, in the hope that time would while away, and she could get back to London.”

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Kristen Stewart in Spencer; Princess Diana.Neon; Julian Parker/Getty

spencer and princess diana

According to Wharfe, the Princess of Wales “confined herself to spending time in the kitchen with the chef or with people like me, in the hope that time would while away, and she could get back to London.”

03of 05Kristen Stewart in Spencer; Princess Diana.Neon; Anwar Hussein/GettyRoyal biographer Ingrid Seward, a journalist with whom Princess Diana was friendly, confirms that Diana hid her struggles during royal family gatherings.“She would have put on a good front for the Queen and the family,” said Seward. “She was a properly brought-up girl and would have considered it rude to make a scene or a spectacle of herself.”

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Kristen Stewart in Spencer; Princess Diana.Neon; Anwar Hussein/Getty

spencer and princess diana

Royal biographer Ingrid Seward, a journalist with whom Princess Diana was friendly, confirms that Diana hid her struggles during royal family gatherings.

“She would have put on a good front for the Queen and the family,” said Seward. “She was a properly brought-up girl and would have considered it rude to make a scene or a spectacle of herself.”

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Kristen Stewart in Spencer; Princess Diana.Neon; Nils Jorgensen/Shutterstock

spencer and princess diana

“From my experience, Diana never once confided in her dressers,” recalled Wharfe.

05of 05Kristen Stewart in Spencer; Princess Diana.Neon; GettyWharfe praised Kristen Stewart’s portrayal of the late royal: “Out of all the people who have played Diana over the past 10 years, she’s the closest to her,” he said. “She managed to perfect her mannerisms.”

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Kristen Stewart in Spencer; Princess Diana.Neon; Getty

spencer and princess diana

Wharfe praised Kristen Stewart’s portrayal of the late royal: “Out of all the people who have played Diana over the past 10 years, she’s the closest to her,” he said. “She managed to perfect her mannerisms.”

source: people.com