Actress Allison Mack was arrested on Friday, after being indicted on charges of sex trafficking, sex trafficking conspiracy, and forced labor conspiracy. Mack is best known for her role as Chloe Sullivan, Clark Kent’s friend who ran the poorly named “Isis Foundation” in the long-running "Smallville" television series.

Mack pled "not guilty." A bail hearing will be held on Monday.

Mack is accused of being one of the leaders of a sex cult known as Nxivm (pronounced “nexium”). As part of her role, she allegedly took part in torturing women and preparing them to have sex with the group’s leader, Keith Raniere. Raniere, 57, was arrested last month in Mexico. Nxivm was based in Colonie, New York, not far from Albany.

Mack isn’t the only celebrity in trouble for their involvement in this sex cult. Mack’s wife, "Battlestar Galactica" actress Nicki Clyne, was hiding out with Mack in Mexico before they were discovered by authorities. Sara and Clare Bronfman, heiresses to the Seagram’s whiskey empire, are also reported to have been involved in Nxivm. When Raniere was arrested, Clare Bronfman provided him with a million dollars.

Fellow "Smallville" actress Kristin Kreuk spoke out last month to deny rumors that she was also involved in the cult. Kreuk had attended Nxivm self-help seminars, but said that she left the program years ago, and "never experienced any illegal or nefarious activity" while she was there.

Former "Battlestar Galactica" and "Hawaii Five-O" star Grace Park was also alleged to have been involved with Nxivm, but she reportedly cut ties with the organization. She appeared in videos with Raniere that remain on Facebook as recently as May 2016.

Nxivm masqueraded as a self-help program, but used that mundane façade to recruit women for Raniere.

In an official statement from the U.S. Attorney's Office in the Eastern District of New York, United States Attorney Richard P. Donoghue accused Mack of recruiting women “to join what was purported to be a female mentorship group that was, in fact, created and led by Keith Raniere.” He continued:

“The victims were then exploited, both sexually and for their labor, to the defendants’ benefit. This Office and our law enforcement partners are committed to prosecuting predators who victimize others through sex trafficking and forced labor.”

Assistant director-in-charge of the FBI, William F. Sweeney Jr., said that this case "brought to light an inconceivable crime." He added:

“As this pyramid scheme continues to unravel, we ask anyone who might have been a victim to reach out to us with information that may further our investigation.”