Rob Reiner's son Nick Reiner was 'freaking everyone out' and 'acting crazy' at Conan O'Brien's holiday party before murders

Nick Reiner was reportedly acting erratically with guests at Conan O’Brien’s Christmas party Saturday night — hours before his parents, Rob Reiner and Michele Singer Reiner, were pronounced dead.

“Nick was freaking everyone out, acting crazy, kept asking people if they were famous,” an insider told People Monday, with a second source claiming to Us Weekly that he behaved “creepily” at the bash.

A third insider alleged to TMZ that the 32-year-old looked out of place at the party, wearing a hoodie to a formal party.

Nick Reiner (seen here on Sept. 9) was reportedly acting erratically at Conan O’Brien’s holiday party — hours before his parents, Rob Reiner and Michele Singer Reiner) were found dead at their home in Los Angeles. BACKGRID
“Nick was freaking everyone out, acting crazy, kept asking people if they were famous,” a source told People about Nick (seen here in 2024) on Monday. Getty Images for Wynn Las Vegas

Several other insiders echoed previous reports that Nick then allegedly got into a “very loud argument” with Rob, which resulted in his parents leaving the party post-confrontation.

Reps for O’Brien and Rob did not immediately respond to Page Six’s requests for comment.

As Page Six previously reported, Rob and Michele were found stabbed to death in their Los Angeles home on Sunday afternoon. Sources told The Post that their 28-year-old daughter, Romy Reiner, discovered their bodies.

“It is with profound sorrow that we announce the tragic passing of Michele and Rob Reiner,” the family confirmed in a statement to Variety.

“We are heartbroken by this sudden loss, and we ask for privacy during this unbelievably difficult time.”

The 32-year-old allegedly got into a “very loud argument” with Rob (pictured on the far right in August 2024) before leaving the party. (Albert Brooks, left, Conan O’Brien, center). Variety via Getty Images
Rob and Michele, seen here in 2015 with their kids Romy (left), Nick (center) and Jake (right), were found stabbed to death in their Los Angeles home on Sunday. michelereiner/Instagram

Early Monday, Page Six confirmed that Nick was arrested on charges of murder and is currently being held at Twin Towers Correctional Facility in Los Angeles without bail.

Nick has notoriously had a rocky relationship with his parents and has openly struggled with drug addiction. He also allegedly had a history of violence, according to sources who knew him and the family.

“This is not the first time their son has been violent,’’ a longtime neighbor of the Reiners, who asked to remain anonymous, told The Post Monday.

“I know of another incident a few years back with Nick, but I won’t say more than that. I just never thought it would ever get to this point.”

Page Six confirmed that Nick (photographed here with his dad in 2016) was arrested on charges of murder. FilmMagic
Page Six was told by a source that Nick “really resented his dad” and “hated himself for not being as talented, prolific or beloved.” FilmMagic

An insider also told us that the suspect “really resented his dad” and “hated himself for not being as talented, prolific or beloved.”

Meanwhile, Alanna Zabel — a yoga instructor who taught Rob and Michele — spoke to Page Six Monday about Nick’s “egocentric” behavior and “screaming” sessions that would allegedly last up to 20 minutes in the early 2000s.

She described Nick as “this little boy” with “behavioral issues” who was “trying to figure it out” but “always upsetting everyone.”

The Reiner family, from left, Jake, Rob, Nick (top), and Michelle and Romy Reiner (bottom) before the killings. @michelereiner/Instagram
Nick is currently being held at Twin Towers Correctional Facility in Los Angeles without bail. WireImage

Rob, who was 78 years old, and Michele, who was 68 years old, also shared a 34-year-old son, Jake Reiner.

The actor also had an adopted daughter, Tracy, 61, from his first marriage to Penny Marshall.

Rob and Michele had been married since 1989.

You May Also Like

Lakers Starter Ruled Out After LeBron’s Buzzer-Beater

Getty The Los Angeles Lakers celebrate with LeBron James after a buzzer-beating…

Red Sox ‘Prioritizing’ Top Starting Pitcher Over Other Free Agents

Getty A star free agent could be headed to Boston as the…

Victoria Beckham continues to put on a brave face as she plugs new £44 blush from her beauty brand amid ongoing feud with son Brooklyn and his wife Nicola Peltz

Victoria Beckham continued to put on a brave face on Tuesday as…

Katie Price infuriates tourist who says their stay at five star hotel in Turkey was ruined by star using the swimming pool with ‘blood all over her face and incisions weeping’ after sixth face lift

A disgruntled tourist has taken aim at Katie Price, saying the star…