The 13-episode series is currently filming in New Orleans. Created by Ryan Murphy ("Glee"), the first episode will air Oct. 9 at 10 PM.
As previously reported, "Coven" will also feature Lily Rabe, Sarah Paulson, Kathy Bates and Denis O'Hare as well as Evan Peters, Frances Conroy, Taissa Farmiga, Gabourey Sidibe, Emma Roberts, Alexandra Breckenridge and Jamie Brewer.
The story will center on a group of witches who fled Salem before the infamous trials, and have continued their secretive lives for centuries in New Orleans, 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. 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. Ebersole (Grey Gardens) has been cast as a "Glenda the Good Witch-type of gal," Murphy said in an earlier interview.