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 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.

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.

“It is with profound sorrow that we announce the tragic passing of Michele and Rob Reiner. We are heartbroken by this sudden loss, and we ask for privacy during this unbelievably difficult time,” Reiner’s family said in a statement.

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.

A neighbor told The Post comedian Billy Crystal — a longtime friend of Reiner — was spotted arriving to the home. Larry David was also seen at the home following the murders and Crystal “looked like he was about to cry,” according to ABC 7.

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.

Hamilton assured reporters the people of Brentwood were safe, but said a suspect had not yet been arrested in connection to the murders. Hamilton would also not confirm the identities of the deceased, though LA Mayor Karen Bass and Governor Gavin Newsom both posted tributes for Reiner online.

“This is a devastating loss for our city and our country. Rob Reiner’s contributions reverberate throughout American culture and society, and he has improved countless lives through his creative work and advocacy fighting for social and economic justice,” said Bass.

Jen and I are heartbroken by the tragic loss of Rob Reiner and Michele Singer Reiner,” Newsom said in a post on X.

“Rob was a passionate advocate for children and for civil rights — from taking on Big Tobacco, fighting for marriage equality, to serving as a powerful voice in early education. He made California a better place through his good works. Rob will be remembered for his remarkable filmography and for his extraordinary contribution to humanity,” Newsom added.

Reiner’s home was decked out in holiday decor Sunday. It’s in a posh high-end Brentwood neighborhood with homes protected by large hedges and gates. The Reiner property is less than two miles from where Nicole Brown Simpson was murdered in 1994.

Reiner, 78, is best known for directing a slew of classic ’80s and ’90s hit films, including “When Harry Met Sally,” “The Princess Bride,” “This is Spinal Tap” and “A Few Good Men.”

He first rose to fame for his role as Mike “Meathead” Stivic on the CBS sitcom “All in the Family,” which landed him two Emmy Awards.