Harry Potter actor Robert Knox has died after being stabbed in the early hours of yesterday morning. Knox, 18 had just finished filmiing his supporting role as Ravenclaw student called Marcus Belby in Harry Potter and the Half-Blood Prince. The young talented star was murdered outside the Metro Bar in Sidcup, London.

Knox was reportedly trying to protect his younger brother from the knife-man in a fight outside the bar, which also left three other people with serious injuries.