The cast of the new Harry Potter film, including Emma Watson, will wear white ribbons on their wrists at the film's premiere in London on Tuesday evening as a mark of respect for murdered actor Rob
Rob Knox, 18, plays Marcus Belby in the new film, Harry Potter and the Half-Blood Prince. He was stabbed five times outside a bar in Sidcup, Kent, last May days after finishing the movie.
Daniel Radcliffe (centre) said Rob Knox's death had hit the whole cast. He said: "I won't pretend I knew him incredibly well, or was his best friend on set, but I knew him and liked him."
Rupert Grint (third left) played down getting swine flu. He said: "It was just like any other flu I've had before. It was just a sore throat and I was in bed for a while." The new film's released on 15 July.