Conan O’Brien’s recent Christmas party in Pacific Palisades was a fairly star‑studded Hollywood gathering, but only a limited number of guests have been named publicly in news coverage so far. The full guest list has not been released, so any account is necessarily partial and based only on people identified in public reports.

Known named attendees

From major news outlets and entertainment coverage, these people have been specifically mentioned as being at Conan O’Brien’s Christmas party:

  • Conan O’Brien – Host of the party at his Pacific Palisades home.
  • Rob Reiner – Director and actor, described as one of the prominent Hollywood figures attending the event.
  • Michele Singer Reiner – Rob Reiner’s wife, also present at the party with him.
  • Nick Reiner – Their son, whose erratic behavior at the party was noted by multiple guests and later reported in detail by several outlets.
  • Bill Hader – Actor and comedian, explicitly described as one of the “well‑known” guests and the person whom Nick allegedly interrupted during a conversation.
  • Jane Fonda – Cited as another well‑known attendee, listed alongside Hader as an example of the high‑profile guests present.

Some legal and crime‑focused coverage also generally refers to “many Hollywood stars” and names Billy Crystal and “other stars” as figures likely to be witnesses, implying they were either at the party that night or involved around the same time, but not always stating with absolute clarity who was physically present at the party versus later gatherings.

Nature of the event

Reports consistently describe the gathering as:

  • Held at Conan’s home in the Pacific Palisades, an area previously threatened by wildfires.
  • A festive holiday/Christmas‑season party meant to “forget a bad year” and usher in a better one, attended by Hollywood creatives and executives.
  • A high‑profile social event that later became part of a major criminal case timeline involving the Reiner family, which is why so much post‑party detail exists in court‑ and crime‑related coverage.

What is not publicly known

To keep this accurate and fair:

  • There is no complete, official guest list in the public domain; outlets only mention a handful of names (like Conan, the Reiners, Bill Hader, Jane Fonda) either as examples or because they are directly relevant to the subsequent investigation.
  • Speculation on social media and forums sometimes adds more names based on general assumptions about Conan’s circle, but those are not verified and should be treated as unconfirmed gossip.

So, the best supported answer is that the publicly named guests at Conan O’Brien’s Christmas party include Conan himself, Rob and Michele Reiner, their son Nick Reiner, Bill Hader, and Jane Fonda, with coverage suggesting additional Hollywood stars and industry figures were present but not fully identified in public reporting.

Information gathered from public news coverage and online reports available on the internet and portrayed here.