London, May 25 : Robert Knox, an 18-year-old actor set to star in the new Harry Potter film, was stabbed to death during a fight outside a London bar on May 24.
Robert, who plays Ravenclaw student Marcus Belby in the film, had just finished work on Harry Potter And The Half-Blood Prince, which is due to be released later this year.
He was stabbed to death in a fight outside a bar in leafy Sidcup, Kent, in the early hours of May 25.
He was taken to Queen Elizabeth Hospital, Woolwich, south east London, where he was pronounced dead. Four other men were also hurt in the fight.
Police said a 21-year-old man had been arrested on suspicion of murder.
The alleged man came to the bar in Sidcup armed with two knives and was seen waving one of them around through the window.
A fight broke out and Knox and his brother Jamie were reportedly trying to protect each other, reports News of the World.
Robert is understood to have been fatally stabbed after trying to save Jamie from the man.
In a statement, Rob's parents, Sally and Colin Knox, said: "Rob was kind and thoughtful and would always help out others - he would always spend his last penny on other people instead of himself. The life and soul of the party, he was very outgoing, loved sports, and would always strike up a conversation with people."
"He was respectful to others and adored by all his family and friends. He was an asset to the family," they added.