WandaVision: 10 Insane Fan Theories You Need To Know

10. Kathryn Hahn Is Playing Agatha Harkness

There are still many, many questions that we have about WandaVision, one of which revolves around a certain mystery character. Though we know Kat Dennings and Randall Park will return to the MCU, and Teyonah Parris will become the second person to portray Monica Rambeau, Kathryn Hahn's character remains uncertain.

She is currently listed on IMDb as playing 'Agnes', and has been previously described as a 'nosy neighbour', however she will clearly be playing a substantial role that may be being hidden behind a fake name. Hahn appeared several times throughout the official trailer, and is the one to tell Vision that he is dead.

She has been shown in the trailer to be wearing the classic pointy hat and robe you'd expect to see a 'witch' wear at Halloween time, and the theory is that she will be bringing a coven to the MCU as Agatha Harkness. This particular sorceress from the comics has crossed paths, used, and manipulated Scarlet Witch in the past, and has proven herself to be incredibly powerful.

Her knowledge of Vision's fate could prove to be key, with some going so far as to suggest that she is the one imprisoning the titular duo within the fabricated reality.