The film stars Taissa Farmiga, Demián Bichir and Jonas Bloquet, with Bonnie Aarons reprising her role as the Demon Nun, an incarnation of Valak, from The Conjuring 2.

Warner Bros. Pictures and New Line Cinema announced The Nun, a spin-off film to The Conjuring 2, which had opened five days earlier, with Peter Safran and Wan producing.

In 1952 Romania, two Roman Catholic nuns living at the Saint Cartha's monastery are attacked by an unseen evil force.

Inside the abbey, they meet the Abbess, who informs them that the nuns observe silence during the night so they need to return the next day.

Theorizing that Valak can only be stopped if they seal the rift again with the blood of Christ from the reliquary the same way the knights did, the trio retrieves the vial with Victoria's key.

Twenty years later at a university seminar in Wakefield, Massachusetts, Carolyn Perron watches as Ed and Lorraine Warren present footage of their attempt to exorcise a possessed older Maurice.

Maurice grabs Lorraine, showing her a vision of Ed dying, which initiates the Warrens' investigation of the Perron farmhouse haunting.

Additionally, Patrick Wilson, Vera Farmiga, and Lili Taylor appear in archive footage from The Conjuring as Ed and Lorraine Warren and Carolyn Perron, respectively.

On June 15, 2016, Warner Bros. Pictures and New Line Cinema announced The Nun, a spin-off film to The Conjuring 2, which had opened five days earlier.

[3] On February 17, 2017, it was announced that Corin Hardy had signed on to direct The Nun with a new screenplay from Wan and Gary Dauberman.

[9] Charlotte Hope, Jonas Bloquet, and Ingrid Bisu were subsequently announced to star, rounding out the main cast.

[23] In August 2018, a short advertisement for the film was removed from YouTube due to an unskippable jump scare that violated the platform's "Shocking Content" policies.

[25] In the United States and Canada, The Nun was released alongside Peppermint and God Bless the Broken Road, and was originally projected to gross $32–37 million in its opening weekend.

It went on to debut to $53.8 million, also marking the best figure of the franchise, and became the first film in almost a month to finish ahead of Crazy Rich Asians at the box office.

The website's consensus reads: "The Nun boasts strong performances, spooky atmospherics, and a couple decent set-pieces, but its sins include inconsistent logic and narrative slackness.

[37] Donald Clarke of The Irish Times wrote, "To compare it to a ghost train would be to understate the narrative cohesion that habitually governs those seaside entertainments.

"[38] Matthew Rozsa for Salon said, "By overly relying on jump scares, The Nun uses a mechanical approach toward instilling fear rather than a more profound understanding of terror.

Club, Katie Rife compared it to Gothic horror by Mario Bava and Hammer Films, praising the "giddiness" but criticizing the "heavy-handed" exposition and lack of suspense.

[45] Later that month, Akela Cooper signed onto the project as screenwriter, while Safran and James Wan will serve as producers.