United Kingdom, Dec. 9 -- Nicholas Hoult was told that he would "go off the rails" after finding fame as a child actor.

The Superman star was just 11 years of age when he starred in the 2002 movie About a Boy and reflected on how he was warned numerous times that the careers of child actors decline once they have grown up.

Speaking at the Red Sea Film Festival in Saudi Arabia, Nicholas said: "There was this fear sitting after that because everything then, even as a kid, everyone talks to you about how child actors stop working, their life goes off the rails, and it doesn't work out as an adult.

"You have this fear of what's to come, but even then, I knew I wanted to continue doing it. I was also slightly guarded about it, I suppose, be...