Actress Kristin Kreuk broke her silence Thursday about her participation in “Nxivm,” the creepy self-help group, pronounced “Nexium,” whose leader has been charged with running a sex-slave cult in upstate New York.

Kreuk and fellow CW series “Smallville” star Allison Mack started with the program back in late 2005 and early 2006, and their celebrity status was used by cult leader Keith Raniere to attract members.

But while Mack stayed with the program as it got weirder and more abusive — and was reportedly with Raniere when he was arrested at his Mexican hideaway this week — Kreuk denies she ever recruited anyone, and says she got out before she saw anything “illegal or nefarious,” she tweeted Thursday night.

“I left about five years ago,” she tweeted, “and had minimal contact with those who were still involved.”

Still, she remains “horrified and disgusted” by what the group became, she wrote.

“Thank you to all of the brave women who have come forward to share your stories and expose DOS,” she wrote, referring to the name of the all-women Nxivm “sorority” where in more recent years, the feds say, women would be extorted into having sex with Raniere and forcibly branded with his and Mack’s initials.

“I can’t imagine how difficult this has been for you,” she wrote.

“I am deeply disturbed and embarrassed to have been associated with NXIVM,” she wrote.

“I hope that the investigation leads to justice for all of those affected.”