A teenage actor who had a small role in the next Harry Potter film has died after being stabbed.
Eighteen-year-old Robert Knox played Ravenclaw student Marcus Belby in The Half-Blood Prince.
He died after an incident outside a bar in the early hours of Saturday morning, in Sidcup in south-east England.
Robert died after he was taken to hospital. Police have confirmed that a 21-year-old man has been arrested on suspicion of murder.
Warner Bros, the company behind the Potter films, said: "We are all shocked and saddened by this news and at this time our sympathies are with his family."