Sam Worthington thinks he would have "gone off the rails" if he had found fame younger.

The 35-year-old actor has only achieved worldwide success in recent years, and thinks he wouldn't have coped so well if he hadn't had to wait for his Hollywood breakthrough.

He said: "Look at people like Tiger Woods or the Williams sisters- all they did was practise. If all this had happened to me in my 20s, I could have gone off the rails, but now my feet are pretty sturdy on the ground."

Sam insists he isn't the "most talented" actor but believes he has done well because he works hard and can no longer see any worth in distracting himself away from his career by partying.

He told Men's Health magazine: "I don't really consider myself the most talented actor, but I work a hell of a lot on my ethic, I think it's the best you can do.

"Why waste the opportunity by doing things half-arsed? Whether that's mentally preparing or physically preparing, or just giving a crap about the work. Why waste time by going to every party in town? This isn't what I got into this for."