Michael Madsen, a tough guy character actor and frequent Quentin Tarantino collaborator, has died at the age of 67.

Michael Madsen is dead at the age of 67 from cardiac arrest, IndieWire has confirmed. The prolific character 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."

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.