Catherine attends the UK premiere of 'War Horse' Britain's Catherine, Duchess of Cambridge arrives at the UK premiere of the f...

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Catherine attends the UK premiere of 'War Horse'

Britain's Catherine, Duchess of Cambridge arrives at the UK premiere of the film 'War Horse' in London Jan 8, 2012. [Photo/Agencies]

Britain's Catherine, Duchess of Cambridge attends the UK premiere of War Horse on the eve of her 30th birthday, at the Odeon Leicester Square cinema in London Jan 8, 2012. [Photo/Agencies]

Britain's Prince William (L) arrives with Catherine, Duchess of Cambridge to the UK premiere of the film 'War Horse' in London Jan 8, 2012. [Photo/Agencies]

Catherine, Britain's Duchess of Cambridge, and Britain's Prince William leave the UK premiere of 'War Horse', London Jan 8, 2012. [Photo/Agencies]

Britain's Catherine, Duchess of Cambridge attended the UK premiere of War Horse on the eve of her 30th birthday, at the Odeon Leicester Square cinema in London Jan 8, 2012.