In 2021, fans of the Marvel Cinematic Universe were treated to the first of the new generation of Marvel shows streaming on Disney+: Jac Schaeffer's WandaVision. WandaVision was met with fairly good reception critically, with critics lauding the show's dedication to historical accuracy and spoofing of classic TV favorites. It was met with even better fan reception, with fans taking to social media every week to share theories about the show, celebrate the performances from Elizabeth Olsen (Wanda Maximoff) and Paul Bettany (Vision), and celebrate the many hilarious side characters introduced by the show.

One such character was the show's final villain, Agatha Harkness, played by Kathryn Hahn. Agatha, known as Agnes throughout most of the show, started out as Wanda's helpful but nosy neighbor but soon revealed herself to be the witch Agatha. With her own viral theme song, Agatha very soon became a fan favorite, and not long after the show finished airing, Disney confirmed that she would be getting her own show. With a slew of new stars added to the cast, and with filming completed, let's get into everything we know so far about Agatha: Darkhold Diaries (previously known as Agatha: Coven of Chaos).

Editor's Note: This article was last updated on November 28, 2023.

Who Is Agatha Harkness?

During WandaVision, Agatha was known as Agnes and lived next door to Wanda in the town of Westview. While Wanda and Agnes seem to be the best of friends, her true backstory and intentions soon come to light: Agatha was a part of a coven in Salem, Massachusets, during the era of the Salem Witch Trials. In 1693, her coven set out to execute her for practicing dark magic, which they had forbidden; but, instead of facing the consequences of her actions, Agatha kills the members of her coven present at her trial. She then kills her mother Evanora (Kate Forbes), before flying away. Having studied magic for centuries, Agatha was enraged to see Wanda's natural mastery of the craft and was intensely jealous of her ability to control Westview without consciously realizing what she was doing. Following an epic battle of both magic and wits, Wanda eventually cursed Agatha to live out the rest of her life in her role as Agnes, stuck in Westview.

Agatha's backstory in the comics, however, is a little different. Agatha Harkness has been featured in Marvel Comics since the 1970s, playing an important part in the upbringing and training of the Maximoff twins. Agatha plays the role of a teacher and mentor to Wanda throughout the comics, though she ultimately meets her death at Wanda's hands following the revelation that her children were never real. Agatha's ghost has acted as a confidante and friend to Wanda, and she has even been resurrected in some recent storylines. When asked what she was most excited about in the series, Hahn hinted at what's to come. Saying:

"Her costumes and her nails. They’re fabulous, And who knows, there may be a little song here or there… but no one is saying anything about that — certainly not me!"

When Will 'Agatha: Darkhold Diaries' be Released?

At Marvel's 2022 San Diego Comic-Con panel, it was announced that the series' release window is somewhere around winter 2023. However, since then, the show has been delayed to Fall 2024. Once the series is released, fans will be treated to nine episodes, a welcome change (most Marvel shows have six episodes, with the exception of WandaVision's nine-episode run).

Who Has Been Cast In 'Agatha: Darkhold Diaries'?

Like most Marvel properties, the Darkhold DIaries team has been tight-lipped about the characters that will be cast in the show. Still, a slew of new stars have been confirmed to share the screen with Hahn over the past few weeks. One of these new cast members is Heartstopper star Joe Locke, a casting choice that has driven fans wild with speculation. While his exact role in the show has not been confirmed, many fans have speculated that he could be playing an older version of Wanda's reality-bending son, Billy. Parks and Rec alum Aubrey Plaza has also been confirmed as part of the Darkhold Diaries (then Coven of Chaos) cast. Much like with Locke's role, we're yet to get any hints as to who she could be playing. Plaza did praise the show, saying:

“Coven of Chaos was so fun. I wanted very much to work with Kathryn Hahn, I think she's so great. And without saying anything really, I had a blast. I loved my character in that as well, and I think it's the most elevated Marvel material that's out there. So, it was cool to jump into that world with those people specifically.”

Orange Is the New Black stars Ali Ahn and Maria Dizzia have also joined the cast in unknown roles, though rumors among fans have them tipped to play witches, potentially part of Agatha's original coven. Saturday Night Live star Sasheer Zamata has also joined the Coven. Like the other recent casting announcements, Zamata's role in the show has not yet been confirmed.

WandaVision star Emma Caulfield Ford will be back, reprising her role as Westview resident Dottie, and though the exact nature of this reprisal is unknown, we're still excited! Interestingly, Dottie is also known as Sara Proctor, which is the name of a real-life witch imprisoned during the Salem Witch Trials in 1692. Could this be a hint to Dottie's trajectory in the MCU going forward? We will have to wait and see. In a chat with Entertainment Tonight, Ford teased that Dottie "could probably level up her personal life a little bit." Adding, "I don't know what I am. Maybe I'm fabulous."

In more recent casting news, That '70s Show star Debra Jo Rupp, who played Westview resident Mrs. Hart in WandaVision, has been confirmed to be reprising her role for the new series as well. Like Ford, the exact nature of her role is still unknown. Broadway icon Patti LuPone has also reportedly been cast in Darkhold Diaries. LuPone revealed that she will be playing Lilia Calderu. In the comics, Calderu becomes an ally of Doctor Strange.

Well it’s a coven of witches, and I play Lilia Calderu, who apparently is in the Marvel world, and I researched her, she’s hot! She’s really hot! She is! She’s got a great body, raven hair.

Does 'Agatha: Darkhold Diaries' Have A Trailer?

Unfortunately, we don't have a trailer for Darkhold Diaries just yet. However, Marvel Studios released a behind-the-scenes featurette on November 27 (via TVLine) that shows some footage of Darkhold Diaries being filmed. The featurette will be one of the special features included in the upcoming Blu-ray release of WandaVision. Check out the Darkhold Diaries BTS footage, which includes Kathryn Hahn in a variety of new looks, in the player below:

As a bonus, why not check out the video for "Agatha All Along" if you haven't already:

Who Is Making 'Agatha: Darkhold Diaries'?

WandaVision creator and executive producer Jac Shaeffer returns as the writer and director for Darkhold Diaries, but much like the casting of the show, the creators behind the scenes are also being kept under wraps. WandaVision director Matt Shakman has not been attached to the project yet, but we can expect executive production from Marvel head honcho Kevin Feige. We will have to wait a little longer to find out just who is working on the spinoff series. But, if the production of WandaVision is anything to go by, we can expect a few different writers attaching their names to each episode.