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 began his acting career in the 1980s, but would rise to prominence as a main character in Quentin Tarantino's movies like Reservoir Dogs, Kill Bill: Vol 1 and 2, The Hateful Eight and more.

Michael Madsen apparently went into cardiac arrest and was found unresponsive in his home in Malibu, California, on Thursday morning, according to his manager.