How Nick Reiner Will Spend First Birthday Behind Bars

Nick Reiner won’t be blowing out any birthday candles behind bars … as authorities say he’ll be treated just like every other inmate … meaning no perks — and no presents.

Nick — who is accused of brutally murdering filmmaker father Rob Reiner and producer mother, Michele Singer Reiner — will have no extra privileges Monday, which is when the accused killer turns 33.

“Birthdays are treated like every other day, no special treatment from LASD,” a Los Angeles County Sheriff’s Department representative told Page Six.

The official added … “Inmates have access to telephones in accordance to Module schedules and visits (both in person or video) … There are no additional privileges for birthdays.”

However, it’s possible that Nick might have visitors … “Sept. 14 will be a normal visiting day,” the rep said. But based on what we know, we doubt those visitors will include his siblings.

We reported earlier … Jake and Romy Reiner testified before the Los Angeles grand jury that would later indict him on two counts of first-degree murder in connection with their parents’ deaths.