Katie HolmesKatie Holmes is reportedly exhausted and making herself ill as she trying to keep up with the lifestyle of an A-list star.

Sources tell Star magazine that the former Dawson’s Creek star regularly suffers from splitting headaches which leave her seeing spots and feeling faint - caused by a new-found dieting obsession as she’s positioned as a chic fashionista and a lack of sleep.

A source told the magazine: “Katie doesn’t get enough sleep — and hasn’t for months now.”

“She’s tired and drained much of the day because Tom is so wired, and they stay awake until after midnight. He has boundless energy, and she just can’t compete.”

Katie was spotted visiting her favourite restaurant recently, Joan’s on Third in Los Angeles, and alarmed other customers with her pallor and need to hold onto the door frame as she left the eatery: “She gave us a weak smile and wave before leaving out the back door.”

“She looked like she’d collapse at any moment. A bodyguard had to help her into the car.”

As well as her acting career, her life as Mrs Cruise and being a mum to daughter Suri, Katie is also overseeing the renovation of their $35million Beverly Hills home: “To [Tom], the home is a status symbol so it’s on Katie’s shoulders to pull off something beyond magnificent, something Tom can brag about.”

“She’s giving herself headaches thinking about it and making herself sick.”