Last night's episode of "American Horror Story: Hotel" finally welcomed Angela Bassett's character Ramona Royale, and next week the cast will continue to grow.

The next episode titled "Devil's Night" is the first of the two-part Halloween special that will feature some of the most well-known serial killers throughout history. The episode will include the return of "American Horror Story" veteran Lily Rabe who will play the real-life Aileen Wurons, otherwise known as the most famous female serial killer ever, as HNGN previously reported.

"We're doing a two-part, well, we always do a two-part Halloween episode, but our Halloween episode this year is called 'Devil's Night,'" co-creator Ryan Murphy previously said of the upcoming episode. "I'm directing it because I love the script so much, when we finished it I said, 'I can't give this to anybody else.' Lily Rabe is coming to that episode."

"She's playing Aileen Wuornos, which is really fun and bizarre," Murphy said. "I don't want to give too much away, but I will tell you that she's at the centerpiece of that, and that's who she's playing." 

According to the synopsis, Detective John Lowe, played by Wes Bentley, will be invited to a "Devil's Night Soiree" by Evan Peter's character Mr. March, who is a serial killer himself. The famous guests include Rabe as Wurons, John Carroll Lynch as John Wayne Gacy, Seth Gabel as Jeffrey Dahmer and more, according to Vanity Fair.

The episode will also feature Chloë Sevigny's character Alex Lowe as she tries to "diagnose Holden's odd condition." Last episode Alex finally learned that her missing son Holden was at the Hotel Cortez all along.

"American Horror Story: Hotel" airs at 10 p.m. EDT on FX.

Check out the promo for "Devil's Night" below!