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Ejiofor on 'responsibility' of 12 Years a Slave

18 October 2013 Last updated at 23:43 BST

Chiwetel Ejiofor has spoken of his apprehension at taking on the role of Solomon Northrup in the Steve McQueen film '12 Years a Slave', ahead of its European premiere at the BFI London Film Festival.

The film contains scenes of harrowing violence, including unflinching depictions of slaves being beaten.

He told the BBC's Lizo Mzimba he felt responsible for telling "an amazing story" before realising "I just had to try to tell Solomon Northup's story... and certainly trust in Steve."

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