Val Kilmer’s official cause of death has been revealed. Over a week since his family confirmed the actor’s death at age 65 on April 1, Kilmer's official cause of death has been ruled as pneumonia according to a death certificate obtained by TMZ and reviewed by PEOPLE.

"Batman Forever" actor Val Kilmer died of pneumonia, according to the death certificate issued by the Los Angeles County Department of Health.

Actor Val Kilmer died from pneumonia with several underlying causes, his death certificate revealed. TMZ obtained a copy of the document on Thursday. The certificate listed pneumonia to be the immediate cause,