Rob Reiner’s troubled son Nick reportedly stormed off in a huff after a tiff with comedy heavyweight Bill Hader at Conan O’Brien’s Christmas party — which left other guests

Reiner, 78, and his wife were found dead at their Brentwood home around 3:30 p.m. Sunday after paramedics were dispatched for a medical aid call, said Margaret Stewart, a Los Angeles Fire Department spokesperson. The two bodies were found inside the home.

Two sources told NBC News that Nick Reiner, 32, interrupted a conversation at the party, which was hosted by comedian Conan O'Brien.