Keira Knightley sounds like a "pubescent boy"

The 23-year-old actress – who plays Dylan Thomas’ lover Vera Phillips in
‘The Edge of Love’ – was “terrified” when director John Maybury ordered her
to sing live, because she believed she would be miming to a pre-recorded
track.
She says: “I went to voice coaching. I was absolutely
terrified. I thought my legs were going to buckle and on the first couple of
takes I sounded like a pubescent boy! I didn’t realize I was going to have
to do it live.
“I did go to a studio and record it beforehand so I thought when I got there
I would just be miming and then on the morning when there was god knows how
many extras and hundreds of crew members John came to me and said I had to
do it live. I have never been more terrified in my entire life! But
actually, it was fun in the end.”

Image WENN