A new "American Horror Story: Coven" season 3 teaser trailer has gone viral. Emma Roberts will appear alongside new characters in the New Orleans-set drama set for an October premiere.

The FX show returns with Jessica Lange, and the fresh faces of Kathy Bates and Angela Bassett, according to the New York Daily News.

In the upcoming season, the series is set in a mysterious new New Orleans school for witches. But if you're thinking it's like the Harry Potter's Hogwarts School of Witchcraft and Wizardry, think again!

The 31-second "Initiation" trailer offers a creepy look at the school designed to protect young witches from a mysterious menace. Viewers get a quick glimpse of the three powerful witches, played by Lange, Bates and Bassett. 

The clip's imagery is very powerful and mesmerizing, showing a trail of mysterious girls including Gabourey Sidibe walking into the school. The ladies are dressed in white dress shirts, black skirts and heels, with matching witches hat. We see Evan Peters looking out the window at one point, and Sarah Paulson opening the door to either welcome or just gaze at the mysterious women.

There is also a ghostly presence in the clip, with figures hanging from the school's ceiling. 

Many of last season's characters including Taissa Farmiga will definitely return for a third round, but who knows what other actresses and actors will make guest appearances. The show's third season premieres on Oct. 9 at 10 p.m. on FX. 

Happy and ready for the upcoming season? Check out the newest teaser trailer and tell us what you think in the comments section below!