Actor Paul Ritter dead at 54

British actor Paul Ritter, who appeared in the “Harry Potter” franchise and played a key figure behind nuclear disaster in “Chernobyl,” has died, his agent said Tuesday. He was 54 and had been suffering from a brain tumour.

Ritter was a regular cast member in productions at Britain’s National Theatre, and his stage roles also included “Art” at London’s Old Vic and Prime Minister John Major in the royal drama “The Audience.” He was nominated for a Tony Award in 2009 for his performance in Alan Ayckbourn’s farce “The Norman Conquests” on Broadway.