Harry Potter's Rob Knox Dies After Pub Stabbing

Robert Knox (right) with his mother Sally and younger brother Jamie.

Rob Knox who plays the role of student Marcus Belby in the upcoming Harry Potter And The Half-Blood Prince was fatally stabbed outside Metro bar in Southeast London on Saturday morning.

The BBC reported that Knox, 18, was allegedly trying to defend his younger brother Jamie from a man armed with knives.

A 21-year-old man has been charged with the murder and will appear at a preliminary hearing Tuesday.

Knox, described as "a kind and thoughtful son" by his parents, has a small role as Marcus Belby in Harry Potter and the Half-Blood Prince (slated to be released this fall).

The teenager died from internal bleeding in the early hours of Saturday morning. Three of his friends also suffered knife wounds in the dispute.

"Rob was happy, outgoing and a fun person to be with," his father Colin said in a statement. "Rob always put everyone before himself, was always the first person to stand up against wrong. He achieved so much in his short life."

I heard about this yesterday, although more media outlets are reporting it today. I wish his family and friends the best during this difficult time. This is such a senseless tragedy. R.I.P.