Shirley Douglas has died at the age of 86 from pneumonia, her actor son Kiefer Sutherland has confirmed. He tweeted: "Early this morning my mother, Shirley Douglas, passed away due to complications surrounding pneumonia (not related to COVID19). "My mother was an extraordinary woman who led an extraordinary life. "Sadly she had been battling for her health for quite some time and we, as a family, knew this day was coming. "To any families who have lost someone unexpectedly to the Coronavirus, my heart breaks for you, please stay safe." Shirley was an activist and veteran actress, and her father Tommy Douglas founded Medicare.