Robert Knox

Robert Arthur Knox was an English actor who portrayed the character of Marcus Belby in the film Harry Potter and the Half-Blood Prince, and had signed to appear in its sequel Harry Potter and the Deathly Hallows – Part 1. Having studied at Beths Grammar School, Bexley, Knox began acting aged 11, gaining small roles in British television shows like The Bill, After You've Gone and Trust Me, I'm a Teenager. His first cinematic appearance was as an extra in King Arthur.