Nick Reiner, son of Hollywood director Rob Reiner, pleads not guilty to killing parents

Rob Reiner, 78, and Michele Singer Reiner, 70, died from "multiple sharp force injuries", the LA County Medical Examiner said in initial findings.

The couple reportedly had their throats slit following an argument.

They were discovered by their daughter, Romy, in their sprawling $13.5 million (£10 million) mansion in the Brentwood area of Los Angeles.

Nick was quickly arrested in connection with their deaths.

Rob Reiner was a prolific director whose work included some of the most memorable films of the 1980s and 1990s.

His credits include This Is Spinal Tap, Stand By Me, A Few Good Men and When Harry Met Sally.

Nick Reiner, 32, appeared in a Los Angeles courtroom on Monday wearing a brown jail jumpsuit and a shaved head.

Reiner's lawyer, deputy public defender Kimberly Greene, entered the plea on his behalf as he stood behind glass in an enclosed custody area of the packed courtroom.

Prosecutors allege he fatally stabbed his parents inside a bedroom of their home before fleeing.

District attorney Nathan Hochman said outside court that his office still has not decided whether it will seek the death penalty for Reiner.

He will next appear in court on April 29.

Rob Reiner married photographer Michele Singer Reiner in 1989.

The two met while he was directing the iconic rom-com When Harry Met Sally and shared three children.

Reiner was previously married to actor-director Penny Marshall from 1971 to 1981, and he adopted her daughter, Tracy Reiner.

His father, comedy legend Carl Reiner, died in 2020 at age 98, and Marshall died in 2018.

The family previously said in a short statement: "It is with profound sorrow that we announce the tragic passing of Michele and Rob Reiner.

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

Rob Reiner's top-ranked films, according to IMDB

1. Stand By Me (1986) - 8.1 (out of ten)

2. The Princess Bride (1987) - 8.0

3. This is Spinal Tap (1989) - 7.9

4. Misery (1990) - 7.8

5 = When Harry Met Sally (1989) - 7.7

5 = Flipped (2010) - 7.7