Actress Dame Maggie Smith, known for the Harry Potter films and Downton Abbey, has died at the age of 89, her family has said. A legend of British stage and screen, she won two Oscars during her career - for The Prime of Miss Jean Brodie in 1970 and California Suite in 1979. She had four other nominations, and received eight Bafta awards. In the Harry Potter films, Dame Maggie played the acerbic Professor Minerva McGonagall, famous for her pointed witch's hat and stern manner with the...