Knightley: 'I thought I'd be sacked from Pirates'

Actress Keira Knightley only packed one week's clothing to film The pirates of the Caribbean because she was convinced producers would sack her when they discovered her amateur acting skills.

Knightley, who played Elizabeth Swann in the 2003 movie at the tender age of 18, was so scared she would fail to impress co-stars Johnny Depp and Orlando Bloom, she prepared herself for the worst.