Robbie Williams fighting mystery illness

'Take That' member Robbie Williams has revealed how he is fighting a "life-changing" mystery illness that leaves him constantly drained.

The 36-year-old used to blame his lethargy on depression.

But now, it has emerged that the newly wed singer may be suffering from a form of ME (Myalgic Encephalomyelitis.

"I thought I was lethargic and depressed as a person. I thought that was my make-up," the Daily Star quoted him as saying.

"But I found out a few months ago, completely by mistake, that I'd been ill, and I don't want to go into the why and wherefore.

"But what I had made you lethargic and made you depressed and I'd had it for years and not known. I'm on treatment for it now. It's changed my life," he added.