A Brooklyn federal court judge has indefinitely postponed the sentencings for Nxivm’s Keith Raniere and his co-defendants — including “Smallville” actress Allison Mack.

Raniere, Mack and top-tier sex slave Lauren Salzman all had sentencing dates set for September, but Judge Nicholas Garaufis on Monday ruled they would be pushed back “to allow the Probation Department sufficient time to prepare each Defendant’s pre-sentence investigation report.”

The order follows a decision earlier this month in which Garaufis also canceled July sentencing dates for co-defendants Nancy Salzman, Kathy Russell and Seagram’s heiress Clare Bronfman — meaning not a single sentencing is now scheduled for any of the defendants in the case.

Though Garaufis gave no reason for those postponements, sources familiar with the case said those adjournments were also to allow the Probation Department more time to complete relevant paperwork.

Jurors last month convicted Raniere on charges of racketeering, racketeering conspiracy, sex trafficking, attempted sex trafficking and other charges.

The sweeping verdict followed a grueling six-week trial in which prosecutors argued the so-called “Vanguard” ran a sex cult called DOS in which women were starved, branded with his initials, blackmailed and ordered to have sex with him.

Nancy Salzman, Lauren Salzman, Bronfman, Russell and Mack all pleaded guilty to various charges ahead of trial.

While Mack cooperated against Raniere but was never called to testify, Lauren Salzman took the stand to testify against her longtime lover and slave-master.

Raniere faces up to life behind bars when sentenced.