• Kristen Stewart's performance in "Spencer" is Oscar-worthy, according to film critics and Twitter users 
  • "Spencer" received a three-minute standing ovation from the Venice crowd when it premiered
  • Stewart said the Princess Diana biopic was "one of the saddest stories to exist ever"

Kristen Stewart could win her first Oscar acting award for her biographical drama film "Spencer."

Stewart's film about the late Princess of Wales premiered at the Venice Film Festival on Sept. 3. The movie's debut came just four days after Princess Diana's death anniversary. She died in a tragic car accident on Aug. 31, 1997.

Stewart immediately generated a lot of buzz for her portrayal of the late royal in the movie. Many predicted that she could win an Oscar for her role in the film.

"Future Oscar winner Kristen Stewart is so relaxed and carefree for the #Spencer press tour," writer and editor Stephanie Guerilus tweeted.

"When you're just hanging with Kristen Stewart and she says let's take a f--king do it," Variety editor Clayton Davin wrote on Twitter with a photo of himself and Stewart. "The second stop of her awards tour at #TellurideFilmFestival with many more to go. Her Oscar nomination awaits for #Spencer from @neonrated Woman is a boss! #KristenStewart."

"'Spencer' is haunting & deeply complex character study. A phenomenal film, easily one of the years best. You will not see a better performance this year than Kristen Stewart as Princess Diana. Brilliant filmmaking, storytelling, & score. Kristen is a lock for Oscars. #SpencerMovie," Scott Menzel added.

Film critic Scott Mantz said he was "completely floored" with Stewart's "magnificent" portrayal of Princess Diana. He also commended the "Twilight" actress for her "immersive commitment" which was "beyond incredible."

"Film is an engrossing mood piece & a portrait of #PrincessDiana as a suffocated prisoner looking to make a jailbreak. #telluride," Mantz added.

The film received a three-minute standing ovation from the Venice crowd. Stewart looked teary-eyed as she hugged director Pablo Larraín while the people cheered them on after the closing credits, Variety reported.

Speaking about the film, Stewart said it was "one of the saddest stories to exist ever." The movie also taught her that Princess Diana was "isolated and lonely."

"She made everyone else feel accompanied and bolstered by this light and all she wanted was to have it back," she said of the late royal.

Meanwhile, British journalist and royal commentator Jonathan Sacerdoti believed that while Princess Diana would appreciate Stewart's film, the royal would prefer a film that is focused on the happier times in her life.

"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," he said.

Kristen Stewart
VENICE, ITALY - SEPTEMBER 03: Kristen Stewart attends the red carpet of the movie "Spencer" during the 78th Venice International Film Festival on September 03, 2021 in Venice, Italy. Stephane Cardinale - Corbis/Corbis via Getty Images