Eddie Redmayne in 'hardcore' singing lessons for Les Miserables

Eddie Redmayne is undergoing "hardcore singing lessons" as he prepares to shoot the Les Miserables movie adaptation in March (12).

Oscar-winning director Tom Hooper plans to film the musical with an all-star cast singing live instead of lip-synching to a soundtrack.

Eddie Redmayne, who will play student Marius, reveals he's been working with experts to get his vocal skills up to scratch and has already tested out his abilities onset.

He tells the BBC, "I'm in hardcore singing lessons. I was down in Pinewood (Studios) yesterday doing some tests with Tom and it's all happening...

"If you record an album and then make a music video to that album you are restricted by the choices you made. It is months in advance of what you know what your character (sic) is actually going to be doing. So the idea is that the piano will play and we'll sing live - they've tested it all and I think it will be good."

Hugh Jackman, Russell Crowe and Anne Hathaway will also star in Tom Hooper's Les Miserables, due for release in December (12).