Robert Knox, an 18-year-old actor set to appear in the next Harry Potter film, was fatally stabbed outside a London pub on Saturday. According to British media reports, the actor was part of a brawl that sent five males to the hospital, including a 21-year-old who was arrested on suspicion of murder after being treated for facial injuries. Knox, who appeared in the 2004 film King Arthur, plays Ravenclaw student Marcus Belby in Harry Potter and the Half-Blood Prince, the penultimate film in the series. The film is scheduled for release later this year. He had also been signed for… Read more »