Voice acting can be challenging for screen actors, often requiring the kind of extreme, over-the-top delivery that they look to avoid when working on a live-action project.

This is clear in a behind-the-scenes look at upcoming Ardmaan stop-motion animation Early Man, which The Independent brings you exclusively today, seeing Eddie Redmayne, Tom Hiddleston and Maisie Williams trying to get their mouths around the dialogue Wallace and Gromit director Nick Park has given them.

At one point, Park has to give Hiddleston a chop-heavy back massage in order to get the right sounds of him.

The official synopsis for Early Man is as follows:

'Set at the dawn of time, when prehistoric creatures roamed the earth, EARLY MAN tells the story of courageous caveman hero Dug (EDDIE REDMAYNE) and his best friend Hognob as they unite his tribe against a mighty enemy Lord Nooth (TOM HIDDLESTON) and his Bronze Age City to save their home.'