HBO’s new documentary The Vow is a true crime project at its core, taking on the chilling scandals of the NXIVM organization. Because the group looked to recruiting wealthy women, the sex cult and pyramid scheme underlying the self-help dogma of NXIVM also intersected with celebrity culture. Yes, cofounder Keith Raniere was at the center of it all, and he had a reputation for coercing women into sleeping with him and performing free labor for the organization. But Raniere’s second hand was none other than Allison Mack, who’s best known for her decade-long run on Smallville as Chloe Sullivan. And Mack certainly wasn’t the only Hollywood star tied to NXIVM. Ahead, we’ve compiled a list of the celebrities with links to the infamous cult.