Allison Mack, known for her role on "Smallville," has been released from a California prison.

She was sentenced to three years for her involvement in a sex-trafficking case tied to NXIVM.

Mack manipulated women into becoming sex slaves for NXIVM leader Keith Raniere.

She cooperated with authorities, which helped her avoid a longer prison term.

Raniere was sentenced to 120 years in prison for sex-trafficking charges.

Mack provided evidence of Raniere's secret society and its brainwashed members.

Other prominent members included Clare Bronfman, an heiress, and Catherine Oxenberg's daughter.

Mack expressed remorse and guilt before her federal court sentencing.

She repudiated Raniere and distanced herself from the cult-like group.

Her release was reported by the Albany Times-Union.

Mack's release follows her conviction and sentencing in federal court in Brooklyn, New York.