Her performance won widespread acclaim and was hailed as “mercurial” and “incandescent” by members of the press, while Larrain’s unorthodox direction also attracted praise.
The film - which is yet to have a confirmed UK cinema release date - is set over a weekend in the early 1990s when Diana joined the royal family for Christmas at the Queen’s Sandringham Estate, with the film framed as a “fable from a true tragedy”.
Here is everything you need to know about it.
What have the critics said?
Robbie Collin, chief film critic for The Daily Telegraph, gave Spencer the maximum five stars and said Stewart will be “instantly and justifiably awards-tipped for this”.
He said she “navigates this perilous terrain with total mastery, getting the voice and mannerisms just right but vamping everything up just a notch in order to better lean into the film’s melodramatic, paranoiac and absurdist swerves.”
Writing for The Guardian, Xan Brooks also rated the film five stars.
He noted that Larrain “spins the headlines and scandals into a full-blown Gothic nightmare, an opulent ice palace of a movie with shades of Rebecca at the edges and a pleasing bat-squeak of absurdity in its portrayal of the royals.
“Larrain’s approach to the material is rich and intoxicating and altogether magnificent. I won’t call it majestic. That would do this implicitly republican film a disservice.”
The Financial Times rated the film four stars and praised Stewart’s performance.
Writing for the publication, Raphael Abraham said the Hollywood star “adopts the blonde bob, the Kensington clothes and the breathy voice but stops short of full impersonation, and her performance is better for it.
“That she nails the angst and growing mental frailties of Diana is no surprise.”
Did everybody enjoy it?
The Independent’s Geoffrey Macnab, meanwhile, offered the film three stars and described it as a “self-consciously poetic and elegiac affair”.
He praised Stewart for a “memorable, very mercurial performance”, adding that Spencer is “still a considerable upgrade on the ill-fated 2014 biopic in which Naomi Watts played the princess.
“Stewart’s febrile, sensitive performance and Larrain’s trademark lyricism give it an emotional kick that such predecessors lacked.”
The film also got three stars from the i paper’s Christina Newland who criticised Peaky Blinders creator Steven Knight’s “heavy-handed” screenplay, which she described as often “painfully on-the-nose”.
“Resplendent as Spencer looks, with Stewart dressed in lemon sailor suits and white tulle ball gowns, it eventually becomes tiresome to watch Diana languish in her misery, her eating disorder, and her unravelling mental state,” Newland wrote.
Spencer won only two stars from The Times’ Kevin Maher who described the feature as an “infuriating mixed bag, one that veers wildly from moments of dreamy intrigue to risible scenes of camp”.
Of Stewart’s performance, he added: “The central turn is Diana played by the Twilight star Kristen Stewart with the kind of studied intensity that suggests relentless consumption of the Panorama interview (the head tilt, the batting eyes) and fruitless hours with a dialect coach that has produced only a strange, strangulated whisper.”
Spencer is coming soon to UK cinemas.
A message from the editor:
Thank you for reading. NationalWorld is a new national news brand, produced by a team of journalists, editors, video producers and designers who live and work across the UK. Find out more about who’s who in the team, and our editorial values. We want to start a community among our readers, so please follow us on Facebook, Twitter and Instagram, and keep the conversation going. You can also sign up to our newsletters and get a curated selection of our best reads to your inbox every day.