A US magazine claims that the exhausted actress is suffering from debilitating headaches and dizzy spells as a result of her marriage.

Star cites a recent L.A. lunch date when Katie looked pale, feeble and emaciated, and was so disorientated when she left the restaurant that she “braced herself against the doorframe before her bodyguard carefully guided her into a waiting SUV.”

Sources tell the mag that extreme dieting and her manic husband may be contributing to her ill health.

"Katie doesn't ...