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. Wikipedia
Born: August 21, 1989, Kent, United Kingdom
Died: May 24, 2008 (age 18 years), Sidcup, United Kingdom
Parents: Sally Knox and Colin Knox
Siblings: Jamie Knox