The theme of season six of FX’s “American Horror Story” was a mystery until it premiered — but the lingering question about the anthology series remains how all the previous seasons are connected to each other.

Sarah Paulson, who has appeared throughout the series from executive producer Ryan Murphy, says this season will offer a big reveal.

“I know something and I can’t tell you!” she tells Variety. “I have to tease you like that, because you’re going to go ‘What?!’ It’s not necessarily connected, but something’s happening. Something’s happening that people are going to go nuts for. They’re going to go nutty bobo nut town.”

This big reveal, she promises, will come later this season.”I haven’t (filmed) it yet. It hasn’t been shot yet,” she says. “But it’s something that will be part of this season.”

In season six, Paulson plays Shelby Miller, who moves with her husband, Matt (Cuba Gooding Jr.) from Los Angeles to Roanoke Island, North Carolina, in search of a more peaceful life — but find themselves tormented as soon as they settle into their new home.

Paulson says keeping the theme of this season secret was particularly difficult because the ensemble cast was having so much fun shooting it.

“For a long time I couldn’t even tell people I was doing it,” she says. “Keeping secrets is hard, especially when you’re excited about something. It’s hard, but I know why [Ryan] wanted to do it and I think it was really smart. I think it got people really excited.”

Even though it’s the series’ sixth season, Paulson says her enthusiasm for the series hasn’t dissipated at all. “The thing about it that’s so exciting is that it’s constantly reinventing itself,” she says. “This year is so different than it’s been almost ever. It doesn’t have any of the sort of operatic quality that it usually has, and it doesn’t look the same.”

Season six debuted to record ratings, and Paulson credits fans with fueling the show’s success.

“It’s always sort of surprising to me, still, that I’m on a show that people actually watch and are interested in,” she says. “It’s not like they’re still interested and invested in the character they got invested in season one. They’re interested in the mash-up, what’s it going to be? It’s a kind of personal engagement with the audience, which I think is really wonderful.”