Rob Reiner’s son Nick asked the A-listers strange questions at Conan O’Brien’s Christmas party the night before the screenwriter allegedly killed his parents.
“What’s your name? What’s your last name? Are you famous?” Nick asked actor Bill Hader at the holiday bash, according to the Wall Street Journal.
Rob had introduced his troubled son to the “It Chapter Two” actor, 47, earlier at the party.
The “Being Charlie” writer, 32, also pestered other partygoers with the same questions and was eventually asked to leave.
Page Six has reached out to Hader’s rep for comment but did not immediately hear back.
During the festivities, Rob and his wife, Michele Singer Reiner, allegedly got into a “very loud argument” with Nick. The longtime couple left the party after the confrontation.
Sources told People that Nick was allegedly “freaking everyone out, acting crazy” with guests at the party.
Another source told TMZ that Nick stuck out like a sore thumb at the formal soirée because he was dressed in a hoodie.
Nick also reportedly stormed out of O’Brien’s Christmas party after a tense conversation with Hader.
The day after the party, Rob, 78, and Michele, 70, were found stabbed to death by their daughter, Romy Reiner, 28, in their Brentwood, Calif., home.
On Monday, Nick was arrested on charges of the murders. He is being held at LA’s Twin Towers Correctional Facility without bail.
Nick reportedly went on meth-fueled outbursts when his parents threatened to kick him out.
