Bradley Cooper and Zoe Saldana attend the US premiere of The Words
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The Words: Los Angeles premiere of writer's drama

5 September 2012 Last updated at 14:11 BST

Bradley Cooper and Zoe Saldana have been explaining why they decided to star in the romantic drama, The Words, which tells the story of a writer who finally achieves literary success - with a twist.

The film has had its US premiere in Los Angeles.