According to the site the casting lineup currently includes, Emily Watson, Peter Mullan, David Thewlis, Benedict Cumberbatch, Niels Arestrup, Nicolas Bro, David Kross, Leonard Carow, Rainer Bock, Robert Emms, Patrick Kennedy, Tom Hiddleston and Stephen Graham who we recently announced has been cast in Disney’s Pirates of the Caribbean: On Stranger Tides. He’s doing well at the moment!
War Horse focuses around a farm horse named Joey who is sold to the British Army do work on the battlefields in France during the First Word War.
War Horse is based on the book by Michael Morpurgo and is scheduled for release August 10th, 2011.
Have a look at this video from the stage show in which they use a life size puppet and it’ll give you a little more idea of the storyline.