Movie fans are calling for the next Harry Potter film to be dedicated to a teenager who died after being stabbed outside a Sidcup bar.

Robert Knox was stabbed several times in a large fight outside the Metro Bar in Station Road at midnight on Saturday (May 24).

Witnesses at the scene said Mr Knox was trying to protect his brother Jamie and another 16-year-old friend when he was stabbed four times.

The 18-year-old was taken to Queen Elizabeth Hospital, Woolwich, but he was pronounced dead around an hour after the incident.

Mr Knox, of Maidstone Road, Sidcup, was a keen actor and plays Ravenclaw student Marcus Belby in Harry Potter and the Half-Blood Prince which is due out in November.

On the film website Internet Movie Database fan Nick Navea said: "It has really impacted in me...so young and killed...it's terrible...but it happens...the reality is terrible. I support his family and I hope viewing him in HBP will be a good in memoriam...I think Warner should dedicate some space in the credits like they made in GoF with Mary Selway."

Another poster known as Sw will have his Revenge said: "May he rest in peace. I hope they dedicate HBP to him."

A spokesman for Warner Brothers, the makers of the Harry Potter films, said: "We are deeply shocked by the news and our thoughts and sympathy are with the family."

Mr Knox trained at the D & B theatre school in Bromley Road, Downham.

He appeared in the News Shopper in 2005 after he and 16-year-old brother Jamie, appeared in the Hollywood film King Arthur.