An 18-year-old actor died after a fight in London in which three other men were stabbed and another suffered injuries to his face.
Rob Knox, who had a small part in the next Harry Potter film, died at about 0100 BST after he was stabbed outside the Metro Bar in Station Road, Sidcup.
In a statement his family said: "Rob was kind and thoughtful and would always help others out."
Police said a man, aged 21, had been arrested on suspicion of murder.
The family statement added: "Rob... would always spend his last penny on other people instead of himself.
Police said a man, aged 21, had been arrested on suspicion of murder.
The family statement added: "Rob... would always spend his last penny on other people instead of himself.
Knox had won a part in the new Harry Potter film, The Half Blood Prince.
After the fatal stabbing Warner Bros released a statement which said: "We are all shocked and saddened by this news and at this time our sympathies are with his family."
After the fatal stabbing Warner Bros released a statement which said: "We are all shocked and saddened by this news and at this time our sympathies are with his family."
In the incident in the early hours of Saturday a 16-year-old was stabbed in the chest, but his injuries are not life-threatening, and a 21-year-old was stabbed in the neck. He is reported to be in a serious condition in hospital.
Officers said another person, aged in their late teens or early 20s, sustained a serious injury to their hand.
Officers said another person, aged in their late teens or early 20s, sustained a serious injury to their hand.
Source BBC NEWS