WATCH: King Arthur star talks about rugged beauty of Northumbria

The six-week Where Stories Become Legends digital campaign, a non-commercial partnership between VisitBritain and Warner Bros. Pictures, inspires people to book a King Arthur-themed holiday to Britain using #OMGBLegends (Oh My Great Britain Legends).

The campaign features a behind-the-scenes video of writer/director/producer Guy Ritchie, writer/producer Lionel Wigram and the film’s stars Charlie Hunnam and Jude Law on location talking about the epic British landscapes used in King Arthur: Legend of the Sword and the emotions they inspire.

There is also a clip here featuring Charlie Hunnam describing 'Northumbria' as his big secret in Britain. Explaining how he grew up in the area, he adds: "There's something rugged but so beautiful and stirring and mysterious. You go through such extraordinary countryside that it's well worth a trip to walk Hadrian's Wall."

VisitBritain director of marketing, Clare Mullin, said: "From watching the sunset from the Old Man of Storr on the Isle of Skye to walking in King Arthur’s footsteps in majestic Snowdonia to retracing his story at Tintagel Castle in Cornwall, Britain’s epic scenery, ancient history and magical landscapes have the power to transform our holiday experiences into the stuff of legends.

"Our collaboration with Warner Bros. Pictures on King Arthur: Legend of the Sword is a fantastic opportunity to showcase to a global audience of millions the legendary experiences only available in Britain, inspiring people to book a trip right now to discover their own epic stories."