New cast member J.J Murphy passed away just four days after shooting his first scenes as character Ser Denys Mallister, The Hollywood Reporter notes.

Murphy, an 86-year-old Northern Ireland native, was among the most recent additions to Game of Thrones’ upcoming fifth season. He was cast to portray Ser Denys Mallister, the oldest member of the Night’s Watch and commander of the Shadow Tower.

Murphy’s agent Philip Young confirmed the death in a statement, adding: “I have never encountered a man with more spirit, passion and love for his craft.”

The producers of the HBO hit series have yet to confirm if Murphy’s role will be recast.