LOS ANGELES — Legendary director Rob Reiner and his longtime wife have been found stabbed to death inside their Brentwood home and investigators are eyeing the couple’s troubled adult son as a person of interest, according to law enforcement sources.

Officers were called to the home Sunday afternoon, where they discovered a man and woman with stab wounds, according to cops and sources.

The Los Angeles Fire Department told NBC Los Angeles that a 78-year-old man and a 68-year-old woman were found dead inside the home.

The ages match those of Reiner and his wife, Michele, and Post sources confirmed the bodies discovered were the longtime couple, who married in 1989. The couple’s 32-year-old son and screenwriter Nick Reiner is a person of interest in the deadly stabbing, the sources added.

A knife is believed to have been used in the attack, sources said.

Nick has been open about his issues battling drug addiction and homelessness in the past.

“I was homeless in Maine. I was homeless in New Jersey. I was homeless in Texas I spent nights on the street. I spent weeks on the street. It was not fun,” he told People in an interview in 2016.

Officers had the street blocked off in front of Reiner’s house, and detectives could be seen going in and out of the residence.

A Post reporter on the scene observed a man who identified himself as Rocco tell cops he was Reiner’s assistant and offered assistance to access the home.

In a shambolic press conference outside the Reiner home, LAPD Detective Chief Alan Hamilton shared the department was still in the process of obtaining a search warrant for the property — six hours after 911 was called — to fully investigate the murders.