The 29-year-old "Poker Face" hitmaker gave positive response when asked about her return on the series, but did not give out any details about her character, reported Entertainment Weekly.
When one of her interviewers asked, "Are you back on American Horror Story?" She said "yes". But "I can't promise you how or when or anything like that."
Gaga also talked about sexual assault and her performance of The Hunting Ground's "Til It Happens to You" at Academy Awards.
"It's okay to talk about these things, and it's okay to feel uncomfortable for a second so you can help somebody else," she said.