New York Magazine reports that confirmed cast members also include Evan Peters, Frances Conroy, Taissa Farmiga, Gabourey Sidibe, Emma Roberts, Alexandra Breckenridge and Jamie Brewer.
"American Horror Story" creator Ryan Murphy also revealed that "Coven" will be lighter and more comedic in tone than the previous seasons.
The story will center on a group of witches who fled Salem before the infamous trials, and have continued their secretive lives in New Orleans for centuries where they encounter the voodoo culture. Lange will play the "supreme" role, with Paulson cast as her daughter.
Bassett will play the historical character of voodoo priestess Marie Laveau. Kathy Bates will portray another historical figure, serial killer Marie Delphine LaLauri (Madame LaLaurie).
Part of the plot will pit Lange and her coven against the voodoo witches, as well as the non-witches. "The witches are really sort of a great allegory and metaphor for any minority group that has been persecuted and has had to go underground and, finally, is like, 'You know what? Dammit, no. We're fighting back,' so that's what they do," Murphy said.
"American Horror Story: Coven" will begin filming later this summer in New Orleans.