A WandaVision spinoff starring Kathryn Hahn is in development at Disney Plus from Marvel Studios.

Hahn would reprise the role of Agatha Harkness in the series, which is described by sources linked to Variety as a dark comedy, though exact plot details remain under wraps.

WandaVisionhead writer Jac Schaeffer would serve as the writer and executive producer on the project.

In WandaVision, Hahn started out playing the role of Agnes, Wanda and Vision’s nosy neighbour, before it was revealed she was in fact Agatha, a powerful witch. In the Marvel comics and the series, Agatha is shown to have survived the Salem Witch Trials and is more than a match for Wanda, a.k.a. Scarlet Witch. When viewers last saw her in the finale of WandaVision, Wanda traps Agatha in Westview by using her powers to force her revert to her Agnes persona.

WandaVision aired earlier this year from January-March. The show, the first live-action Marvel series to debut on Disney Plus, was met with widespread acclaim upon its debut. It ultimately racked up 23 Emmy nominations, including one for Hahn for best supporting actress in a limited series. One of the show’s win came in the best original music and lyrics category for the song Agatha All Along, which was used as part of the reveal that Hahn’s character was not who she appeared to be.