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.

Officials have determined what killed actor Val Kilmer. According to the death certificate, the “Top Gun” actor died of pneumonia with underlying causes listed as acute hypoxemic respiratory failure,