Nick Reiner displayed a smirk as he made his court appearance for the arraignment on charges related to the alleged murder of his parents, Rob Reiner and Michele Singer Reiner.

The 32-year-old appeared at Los Angeles’ Stanley Mosk Courthouse on Wednesday morning, sporting a shaved head, facial hair, and notably tired eyes.

Clad in a brown jumpsuit and handcuffed, Nick was positioned behind a glass partition alongside his legal representatives.

Throughout the proceedings, he cast glances toward the gallery, where family, media, and attorneys were seated, a reporter from The Post observed.

There was a moment when Nick bowed his head, seemingly overwhelmed with fatigue.

The filmwriter’s arraignment was delayed once again, with his attorney, Alan Jackson, quitting ahead of the hearing.

“We would ask to withdraw as counsel of record,” the criminal defense lawyer told the judge. “We have no choice but to withdraw and ask to be relieved.”

Kimberly Greene, a Los Angeles public defender, will now represent Nick.

His new arraignment date is scheduled for Feb. 23.

“Uh, yeah, I agree with that,” Nick told the judge before being escorted out of the courtroom.

Nick is currently behind bars at the Twin Towers Correctional Facility, where he is awaiting trial for the Dec. 14 murders of Rob and Michele.

The legendary director, who was 78, and his 70-year-old wife were found dead from stab wounds in their Brentwood, Calif., home.

The night before their deaths, Rob had a heated argument with Nick, who was diagnosed with schizophrenia, at Conan O’Brien’s Christmas party, a source confirmed to The Post.

Nick was arrested hours after his parents’ bodies were discovered and charged with first-degree murder. He faces life in prison without the possibility of parole or the death penalty.

Rob and Michele were also the parents of Jake, 34, and Romy Reiner, 28.