Actress Keira Knightley has refused to allow her bust to be digitally enlarged - because she is so proud of her body.The waif-like star, 23, reportedly dismissed studio bosses' suggestion to use computer trickery to boost her petite breasts on publicity posters.It is claimed publicity shots for her forthcoming movie The Duchess would have featured a bustier version of the British actress - but she insisted against it.A source tells the Daily Mail, "She has insisted that her figure stay in its natural state. She is proud of her body and doesn't want it altered".In 2004, Knightley was criticised when she appeared in publicity shots for King Arthur with digitally-enhanced breasts.

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