The "habitual knife-carrier" who stabbed Harry Potter actor Rob Knox to death was today sentenced to life imprisonment and told that he will spend at least 20 years behind bars.

Karl Bishop, 22, was given four life sentences and will serve a minimum of 20 years after being found guilty yesterday of murdering Mr Knox. The 18-year-old was stabbed five times outside a club in their home town of Sidcup, southeast London, last May.

He was also convicted of injuring four of the actor’s friends. Dean Saunders, 23, was stabbed in the neck and suffered permanent spinal damage. Andrew Dormer, 17, was stabbed in the chest as he tried to disarm Bishop. Nicky Jones, 20, was knifed in the hand and Charlie Grimley, 17, was stabbed in the face and arm.

The young actor had completed filming on Harry Potter and the Half-Blood Prince, in which he played the part of Marcus Belby, just days before his death and was due to reprise the role in the next instalment of the series.

LINK: Click here for the full report from the Times of London.