The Oscar-nominated actress, who stars as Rose Narracott in the filmmaker's War Horse, admitted that she found the director's working methods strange at first because he likes to talk to actors during takes.
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"After an hour or so I started to really enjoy it. Because the film is constructed in such an old-fashioned Hollywood way, every shot is beautifully designed and it lands. He knows exactly what he wants - he's planting little seeds in your head and little things sprout. It's like you're flowering under his watering can of ideas."
War Horse opens in UK cinemas on January 13.
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> War Horse Royal Premiere in pictures
Watch Digital Spy speaking to stars on the red carpet at the War Horse premiere below: