J.J. Murphy, a veteran Irish actor best known Stateside for his portrayal of Ser Denys Mallister on Game of Thrones, collapsed and died on Friday.
He was 86 years old.
Murphy portrayed the oldest member of the Night’s Watch and commander of the Shadow Tower on the HBO epic.
He was in the middle of shooting Game of Thrones Season 5 when he passed away, with more scenes set to come in the weeks ahead.
It's unknown at this time whether producers will re-cast the role in the wake of the actor's passing, or cut Mallister out of future episodes.