Potter cast to honour murdered co-star

The cast and crew of Harry Potter and the Half-Blood Prince have revealed that they will pay tribute to murdered castmate Rob Knox at tonight's world premiere.

The 18-year-old, who played Marcus Belby in the upcoming film, was knifed to death outside a South East London bar last year. His attacker was jailed for life in March.

Speaking at a press conference for the movie, star Bonnie Wright (Ginny Weasley) said: "It's going to be quite a traumatic experience for his family, who've been very supportive of him. Obviously tomorrow is going to be quite difficult, going to see him in the film.

"We wanted to wear as a mark of respect a white ribbon, not only for his life but for other families who have also experienced this traumatic crime, just to show our involvement in raising awareness."

Co-star Daniel Radcliffe (Harry Potter) added: "I won't pretend that I knew Rob incredibly well or that we were best friends on set, but I knew him and I liked him and what happened to him was obviously tragic and awful."

Harry Potter and the Half-Blood Prince is released on July 15.

> Click here to watch our video coverage of the Harry Potter and the Half-Blood Prince press conference