Actor Michael Madsen, renowned for his tough-guy portrayals in Quentin Tarantino’s films, died Thursday morning at his Malibu, California, home. Deputies responding to a 911 call found the 67-year-old unresponsive at about 8:25 a.m. and pronounced him dead at the scene, the Los Angeles County Sheriff’s Department said. Managers Ron Smith and Susan Ferris attributed the death to cardiac arrest. Born in Chicago in 1957, Madsen built a four-decade career spanning more than 340 film and television credits. His breakout turn as the sadistic Mr. Blonde in 1992’s “Reservoir Dogs” anchored a long collaboration with Tarantino that included both volumes of “Kill Bill,” “The Hateful Eight” and “Once Upon a Time in Hollywood.” Beyond those roles, he appeared in mainstream titles such as “Donnie Brasco,” “Die Another Day,” “Sin City” and “Thelma & Louise,” and lent his gravelly voice to video-game franchises including “Grand Theft Auto” and “Dishonored.” According to his representatives, Madsen had recently completed several independent features—“Resurrection Road,” “Concessions” and “Cookbook for Southern Housewives”—and was preparing to publish a poetry collection, “Tears for My Father: Outlaw Thoughts and Poems.” Tributes from across the industry quickly followed news of his death, with sister Virginia Madsen calling him “thunder and velvet,” while co-stars Vivica A. Fox and Harvey Keitel praised his distinctive screen presence and generosity on set.