Ryan Murphy, co-creator of the hit FX series “American Horror Story,” wasn’t kidding around when he said that Season 5 of the chilling drama, titled “Hotel,” was going to feature a slew of “bad boys and girls.” But little did fans know just how wicked their favorite “AHS” actors will be when they returned to the small screen in the fall.

During FX’s summer press tour, the mastermind behind the frightening TV series, which is set to premiere on Wednesday, Oct. 7, dished horrifying details about Lily Rabe’s impending character.

“Our Halloween episode this year is called ‘Devil’s Night,’” Murphy revealed, adding that he would be directing the chilling installment. “Lily Rabe is coming to that episode, and she’s playing Aileen Wuornos, which is really bizarre. She’s at the centerpiece of that Halloween episode, and that’s who she’s playing.”

american horror story season 5 spoilers Lily Rabe (not pictured) will transform herself into Aileen Wuornos, pictured above in an updated photo from the Florida Department of Corrections, in Season 5 of "American Horror Story: Hotel." Photo: Getty Images

Wuornos was an infamous American serial killer who killed seven men between 1989 and 1990 in Florida. The Michigan-born murderer claimed that she killed the victims out of self-defense, explaining that they had either raped or attempted to rape her while she was working as a prostitute. However, Wuornos was ultimately convicted, sentenced to death and executed by the state of Florida through lethal injection on Oct. 9, 2002.

In 2003, actress Charlize Theron brought the horrifying story of Wuornos’ gruesome crimes to the big screen in the Patty Jenkins-directed film “Monster,” which earning the blond-haired star an Oscar for best actress. Now, the beloved “AHS” alum will be taking a stab at it (literally) as she transforms herself into the cold blooded killer.

So, who will Rabe’s character be putting six feet under during Season 5 of “American Horror Story”? Well, considering Wuornos had an itch to slaughter men, we think it’s safe to assume the hunky male cast members of “Hotel” may want to watch their backs before Rabe’s character sticks a knife in it.

“American Horror Story: Hotel” will air its Season 5 premiere on Wednesday, Oct. 7, at 10 p.m. EDT on FX.