Here's what we know: The second season will be set on the East Coast, in an insane asylum in 1960s, and in an interview with MTV, "American Horror Story" writer Tim Minear revealed that Lange's character is nothing like Season 1 bad girl Constance.
"She's not playing this kind of ersatz Tennessee Williams character this time," he said. "She's playing something that's a little more East Coast, a little more patrician."
Unlike Constance, the darkly-motivated antagonist of the show's first season, Lange's new persona is much more pure and innocent. "She's playing a nun," he said. "She's playing an administrator of a facility. It's different. In this instance, she's a bride of Christ."
But Lange isn't the only familiar face returning to "AHS." In May, showrunner Ryan Murphy revealed that Evan Peters, who played "ultimate badass bad boy" Tate Langdon, will be "the hero of the show" in the second season. "It’s not like the actors are playing similar parts. They’re going to look different, they’re going to sound different, they’re going to have different accents," Murphy explained to Vulture. "It’s a different time period. The actors are so excited to do that and hopefully their enthusiasm will translate."
In addition to Lange and Peters, stars Zachary Quinto, Lily Rabe and Sarah Paulson will be back for Season 2. Meanwhile, Chloe Sevigny, Maroon 5 frontman Adam Levine and James Cromwell will also join the "American Horror Story" cast. Levine recently gave E! Online the scoop on his character.
"I'm newly married, and I go with my wife on our honeymoon," Levine teased. "I don't want to tell you too much and it and actually I should shut my mouth because [Ryan Murphy] will freak out, but it's gory…it sounds like so much fun and that's why I wanted to do it. I was like, this doesn't even sound like acting; this sounds, like, hysterical, funny, dark and cool and right up my alley."
Meanwhile, relatively unknown French actress named Lizzie Brocheré will be playing a femme fatale named Gia.
However, don't get too attached to these characters. As Minear reminded, when it comes to "American Horror Story," no one is safe. The writer revealed that when he was approached to write for the show, he had reservations about turning Murphy's idea into a television series.
"And Ryan immediately had the answer, and that was, 'Oh, the way we sustain it is by the end of the season, we have killed off every character,'" he told MTV. "And I'm like, 'I'm in!'"
Related on HuffPost:
More:TV Canada American Horror Story Season 2 Spoilers Jessica Lange American Horror Story Adam Levine American Horror Story Fx
HuffPost Entertainment is your one-stop shop for celebrity news, hilarious late-night bits, industry and awards coverage and more — sent right to your inbox six days a week. Learn more