Rob Reiner & son Nick got into a heated argument at Conan O'Brien's Christmas party over the weekend.

#EXCLUSIVE 🚨 Rob Reiner & son Nick got into a heated argument at Conan O'Brien's Christmas party over the weekend.

Details: https://t.co/Px4WSRPcie pic.twitter.com/PCKWOO0twp

— TMZ (@TMZ) December 15, 2025