Rob Reiner’s son Nick 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.

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.

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