Katie Holmes has blamed her dramatic weight loss on her gruelling work schedule.

The actress' health came under the spotlight when she appeared increasingly thin during her stint in the Broadway production of Arthur Miller play All My Sons.

But Katie - who has so failed to regain her curves since taking her final bow in early January - plays down her skinny frame in a new interview, and insists her disappearing act is just a by-product of her busy career.

"My metabolism was in full gear the whole time," she said. "I lose weight fast when I'm working so hard.

"It doesn't matter how much I eat, I just get thin. It's not the worst problem in the world to have though is it?"

Katie looking frail and gaunt after a performance of All My Sons in January (Splash News)

Despite her drained appearance in recent months, Tom Cruise's missus claims that juggling motherhood and her acting career is mostly "fun."

"I happen to be a woman who believes she can have it all," she says.

"But, we women can do an awful lot if we put our minds to it. And not only that, we can have fun doing it! Even when it's crazy - which is pretty much most of the time - it's fun. At least, that's been my experience.

"It's a good combination for me and Tom - work and family, a healthy balance."

See more stars whose weight has come under the spotlight