Michael Madsen, a frequent Quentin Tarantino collaborator on films like "Reservoir Dogs" and a veteran actor in "Free Willy" and more, has died at 67.

Michael Madsen, a prolific character actor best known for his frequent appearances in Quentin Tarantino films, died Thursday morning. The cause of death, his manager said (per NBC News), was cardiac arrest. He was 67.

M ichael Madsen is dead at the age of 67 from cardiac arrest, IndieWire has confirmed. He was found unresponsive July 3 in his Malibu home. The prolific character actor was best known for his decades-spanning collaborations with Quentin Tarantino, appearing in the director’s “Reservoir Dogs,” “Kill Bill,” and “Once Upon a Time in Hollywood.”