Dakota Johnson feels intimidated by fame.

The 25-year-old actress, who stars as Anastasia Steele in the much-anticipated film adaptation of the E.L. James novel 'Fifty Shades of Grey', admits she feels anxious about becoming a household name.

She shared: ''There is something very scary about thinking everyone in the world [will] know who I am.''

In fact, the actress admits she had doubts about whether or not to accept the role in the eagerly-awaited film.

Asked whether she questioned her decision, she told the Sunday Telegraph newspaper: ''Yes. Of course. Absolutely. The whole time. Even now there are moments when I think, 'What the f*** have I done?' But most of the time I feel pretty solid about it.''

Johnson, who has two stars as parents - Melanie Griffith and Don Johnson - says that although she grew up in the entertainment industry, she is not impressed by the glitz and glamour of Hollywood.

She revealed: ''I grew up around really not normal people.

''My family is general Hollywood. They're all artists: creative people who are advocates for expressing themselves. But I also have to say I'm not impressed by Hollywood.''