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Kristen Stewart Shares What It Was Like To Portray Princess Diana As A Bride In 'Spencer': 'That Was A Spooky Day'

Kristen Stewart, who plays Princess Diana in the upcoming biopic 'Spencer,' says it was 'spooky' to put on a wedding dress resembling Diana's.

Kristen Stewart is sharing what it was like to portray Princess Diana on her wedding day.

Though the upcoming biopic Spencer doesn't have a full scene depicting Diana and Prince Charles' big day, the actress revealed that viewers will see her in the wedding gown via a "montage" of flashbacks.

"Putting that on was a spooky day," the Twilight star recalled of wearing the gown. "We didn't have to do the wedding scene, but I still had one walk, walking outside of this castle..."

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Because it was such a "precise" moment, the director told Stewart to "'take everything you learned about that day, all of your emotional responses that you've accumulated and put them all right here. What does it feel like to believe in an ideal that then becomes very, very apparently farcical. It's kind of just like, let your heart break in a moment.'"

Stewart revealed that she did tons of research to portray the late mom-of-two, revealing that it was "intimidating" to try and perfect Diana's voice and accent, but she still enjoyed every second of filming.

"I took more pleasure in my physicality making this movie than I have on anything," she said. "I felt more free and alive and able to move — and taller, even."

And while Diana was known for her style, the star said it "didn’t really matter what she was wearing."

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"She was someone who used clothes as armor but was so constantly available and visible," the Panic Room actress explained. "She couldn’t hide, she wore her heart on her sleeve and that, to me, is the coolest thing she did."

"I look at her, the pictures and fleeting video clips, and I feel [like] the ground shakes and you don’t know what’s going to happen. [She] sticks out like a sparkly house on fire," the California native continued. "The really sad thing about her is that as normal and casual and disarming in her air [as she is], immediately she also felt so isolated and lonely. She made everyone else feel accompanied and bolstered by this light and all she wanted was to have it back."