Hallett, from the Cape Cod village of Osterville, Mass., appeared on more than 70 episodes of the Buffy the Vampire Slayer spinoff, Angel, between 2000 and 2004. The accomplished actor was also a musician and sang two songs ("Lady Marmalade" and "It's Not Easy Being Green") on the Angel: Live Fast, Die Never soundtrack, released in 2005.
The actor's character on Angel was Krevlornswath of the Deathwok Clan, or Lorne for short. Hallett's Lorne was a friendly demon, who, when not assisting Angel and his team in the investigation of various and sundry underworld mysteries, served as the host and headliner at a demon bar.
Back in 2001, Hallett told our own Jen Godwin that despite constant flirtation with David Boreanaz' character Angel, and the occasional sly Elton John reference, "We don't really know if he's gay. I don't really know. It's funny, because sometimes he's right in Angel's face, and that's when I feel it the most. And viewers would probably think, hmm, what's going on here? This guy's pretty curvy."
Hallett has spent his post-Angel years working on his music career, playing shows around the country. He had been admitted to the hospital three or four times in the past few years for his heart condition, according to Pat.
Another Angel castmember, Glenn Quinn, who played Doyle in season one, passed away in 2002.
A private funeral service will be held for family and close friends in Cape Cod, most likely over this weekend.