Kristen Stewart Opens Up About Playing Princess Diana: 'She Felt So Isolated And Lonely'

Kristen Stewart shared her thoughts on Princess Diana after portraying the late royal in the movie "Spencer."

Speaking at a Venice Film Festival press conference Friday before the biopic's premiere, Stewart opened up about her admiration for Princess Diana and what she learned about the late Princess of Wales' personality.

"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 was quoted by Us Weekly as saying. "[She] sticks out like a sparkly house on fire. … There are some people endowed with an undeniable, penetrating energy. The really sad thing about her is that as normal and casual and disarming in her air [as she was] 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."

Stewart added that though Prince William and Prince Harry's mom was beloved and "accessible," she felt that Princess Diana was misunderstood.

"You feel like you’re friends with her [or] like she was your mother. But ironically, she was the most unknowable person," the "Twilight" star explained. "In the imagining of these three days, we wanted that to really come to a head."

"Spencer" will follow Princess Diana's 1991 holiday weekend at Sandringham House in Norfolk, before her marital difficulties were revealed publicly in Andrew Morton’s 1992 book "Diana: Her True Story." Her divorce from Prince Charles was finalized in 1996.

Talking about her transformation into the People's Princess for the biopic, Stewart said she "took more pleasure in my physicality making this movie" compared to other projects.

"I felt more free and alive and able to move — and taller, even," she added.

During a previous interview with InStyle magazine, Stewart revealed that she had read several biographies about Princess Diana to prepare for the role. Among the challenges on her part was getting the late royal's accent right because it was "distinct and particular" and most people knew her voice.

She also described "Spencer" as "one of the saddest stories to exist ever."

In August, British journalist and royal commentator Jonathan Sacerdoti said he believes that Princess Diana would be "grateful" that her memories live on decades after her death because she had always wanted to be the "queen of people's hearts." However, he also suggested that the princess would have preferred that people remember the happier times of her life.

"I can’t say how she would feel about it, but I think it’s a shame that we’re remembering her so much for tragedy and sadness," he told Us Weekly. "Not only because it’s a bit self-indulgent, really, that we’re just wallowing in this sadness … but I think that because really Diana’s own attempts were to be quite a force for good and positivity. I think it would be a shame just to remember tragedy."

"Spencer," which also stars Jack Farthing, Jack Nielen, Freddie Spry and Sally Hawkins, hits theaters on Nov. 5.