Ralph Fiennes' biggest fear is "disappointing other people".
The 'Grand Budapest Hotel' actor admits he often worries he is "failing" when he is playing out a role, and gets particularly concerned about letting people down on a movie or theatre production.
When asked about his greatest fear, Ralph, who is currently starring in Henrik Ibsen play 'The Master Builder', replied: "Disappointing other people.
"Even when I'm doing something I love, like this play, it carries with it all the fear of failing.
"My area of vulnerability is not letting people down. And being disappointed if I have."
While the 53-year-old star worries about upsetting people, he has been told that he makes people "nervous" at times but insists he is the one who feels anxious.
He told Red magazine: "People think I am very aloof or withdrawn. And I can be withdrawn.
"I can put up a barrier if I want to. It has been reported to me that I make people nervous.
"I'm actually very nervous myself. But I have been guilty of, when people are talking, going off in a dream. I glaze over."