Actor Michael Madsen passed away last week at the age of 67, and now, his cause of death has been confirmed.

If you didn’t see the news, the Kill Bill and Reservoir Dogs actor passed away on Thursday (July 3) at his home in Malibu, Calif. He was pronounced dead at the scene.

It was his personal doctor who reportedly confirmed the cause of death.

Keep reading to find out more…

His cardiologist shared, via an NBC affiliate, that Michael allegedly died from heart failure. His death is listed as from natural causes, and the Los Angeles Sheriff’s Department has closed the case.

There will be no autopsy performed, as his doctor signed the death certificate.

If you didn’t see, his sister, actress Virginia Madsen, released a statement mourning her brother after his passing.

Our continued thoughts are with Michael‘s loved ones during this time. RIP.