Exclusive: Ewan McGregor in powerful The Impossible trailer

Ewan McGregor and Naomi Watts star in the moving new trailer for natural disaster movie 'The Impossible'.

The beginning of the video gives us a terrifying glimpse at the dramatised version of the tragic Indonesian tsunami that killed 230,000 people in 2004.

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McGregor and Watts star as couple on holiday who are caught up in the tsunami which splits their entire family apart.

At the helm is director Juan Antonio Bayona who's best known for his only other feature film to date, 'The Orphanage'.

'The Impossible' is due to be released in the UK on 2 January 2013.