The show's executive producer Ryan Murphy previously revealed that the second run will focus on a completely new storyline but explained that some of the original cast members will return in different roles.
Paulson, who appeared in the first season as Billie Dean Howard, was named as one of the returning stars at PaleyFest last week.
"I was very excited and I felt very honoured to be included in the people that [Murphy] wanted back," she told E! Online. "He had mentioned something to me last season in passing and I thought, 'Oh, I hope to God that happens!'"
However, Paulson explained that work on the second season is still in the "early stages" and added: "I know some things, but no, you do not get to know!"
Jessica Lange was the first returning star to be confirmed, while Zachary Quinto will have a lead role in the new episodes.
Evan Peters and Lily Rabe are among the other original stars who will appear in the new season of American Horror Story.