Tom Hiddleston's biggest fear in life is to have regrets.

The 'Thor: The Dark World' actor admits he isn't worried about dying, but he does worry about looking back and feeling as though he hasn't made the most of his life.

He explained: ''I have terrible fear of wasting time. Who knows? Maybe I should relax a bit. Maybe working too hard is wasting time. I have a fear of regret. I'm not afraid of death, although I know that sounds odd.''

The 32-year-old British hunk has become a household name for his portrayal of mischievous villain Loki in Marvel's 'Thor' and 'Avengers' movies and he feels it's no coincidence he has achieved success in his thirties as opposed to his earlier years because he feels more prepared to tackle challenging roles and big projects.

He told GQ magazine: ''Maybe it's just getting older. You become so palpably aware this is not a dress rehearsal. There's a big sign in blazing neon that says, 'You haven't got long.' But I think it takes a beat to learn that. Life has to knock you down in order for you to realise it, because when you're a kid, you think you're immortal.''