These child stars had their whole lives ahead of them but heartbreakingly died too young. Some of Hollywood's youngest talent tragically never got to grow old and star in adult films and shows. The likes of Harry Potter's Rob Knox and Disney's Cameron Boyce had already got their careers off to a flying start when they sadly passed away.

For some, it was a rare disease that took their lives, and for others, plain bad luck that caused their untimely death. One young girl was harrowingly murdered in cold blood by her own father. Here, the Mirror takes a look back at these devastating losses.

.. Rob Knox The 18-year-old British actor played Marcus Belby in Harry Potter and the Half-Blood Prince and had just wrapped up filming when he was stabbed to death after a row outside a bar in Sidcup, Kent, in May 2008.

Rob had stepped in to defend his brother Jamie, then 17, before being butchered by killer Karl Bishop in a 90-second frenzy. "It happened in front of me, I didn't see a knife go in, but I saw Rob go up to get the knives off the boy," Jamie told the Jeremy Kyle Show in 2018. "This kid was just swinging his arms around with knives towards people.

I'll never forget it. I turned around and screamed and when I turned back I saw Rob slumped around him, holding himself with his arms. "He was saying, 'I've been stabbed, I've been stabbed'.

" The subsequent trial heard how Bishop was a known carrier of knives and had armed himself with two knives from his kitchen. He got a life term fo.