Kathryn Hahn Plays Coy About Mephisto Theories for WandaVision Spinoff Agatha: House of Harkness

courtesy of Marvel Studios

Could Marvel surprise WandaVision fans with a Mephisto appearance?

Kathryn Hahn appeared on The Drew Barrymore Show Monday and spoke briefly about her upcoming WandaVision spinoff Agatha: House of Harkness, though she played coy when asked about the villain possibly making an appearance.

"I keep hearing that. I have no idea!" Hahn, 48, said. "Who knows. Probably anything is probably possible, but I have never heard anything definitive about that at all."

Hahn made a giant splash in the limited Disney+ series as Agatha Harkness, Wanda's witchy neighbor who battled for control of the neighborhood. While no plot details have been revealed, Disney+ announced the series will be a "dark comedy" that centers on the magical lead.

The actress also stayed mum on the House of Harkness storyline in general, telling host Drew Barrymore: "I mean, I didn't even know the title of the show until it was released to the public, like they keep it so tight."

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The Shrink Next Door star could've heard the rumor from fans who are waiting for Mephisto, the devil of the Marvel Comics universe, to appear in a Disney+ series since he has never appeared in the Marvel Cinematic Universe.

The rumors of a second season for WandaVision were previously debunked when Wanda herself, Elizabeth Olsen, told PEOPLE that the show won't be renewed. "No, that's easy for me to answer. It is a limited series. It's a fully beginning, middle, end, and that's it kind of thing," Olsen said ahead of the Season 1 premiere on Disney+.

Agatha: House of Harkness is expected to premiere sometime in 2022.