Washington, May 13 (ANI): If there's one thing that Keira Knightley is terrified of, it would be showing off her vocal skills in a movie.

The Oscar nominated star recently sang in front of an audience for her new film 'The Edge of Love'.

However, she was so nervous about the whole experience that she has vowed never to get up and sing again.

I did some lessons with a voice coach because I can't sing. There were 100 extras and John (Maybury, the director) was like, 'Now you're going to sing...' I've never been so frightened in my entire life, Contactmusic quoted her, as telling Total Films.

I don't know how singers do it. I never want to have to do it again. I don't want to be a rock star, she added. (ANI)