War Horse: Steven Spielberg reveals why he gave the lead to an unknown

As he prepares for the release of his latest epic, War Horse, Steven Spielberg reveals why he gave the lead to an unknown

Taking a ride: Jeremy Irvine as Albert, the film's leading man

Up close: Actor Jeremy Irvine, left, with members of the crew during rehearsals

On set: Steven Spielberg, centre, sets up his next shot during filming