Actress Catherine Zeta-Jones has checked into a treatment centre as part of her ongoing battle with bipolar disorder.

The Chicago star is seeking expert advice to "manage her health", according to her publicist Sarah Fuller.

A statement from Fuller, issued to Wenn on Monday night (29Apr13), reads, "Catherine has pro-actively checked into a healthcare facility. Previously Catherine has said that she is committed to periodic care in order to manage her health in an optimum manner."

Editors at were the first to break news of Zeta-Jones' latest treatment, and they report the 43 year old is expected to complete a 30-day program.

News of the Oscar winner's mental health issues emerged in 2011 when she entered a medical facility in Connecticut to combat a serious bout of depression.

She went public about dealing with the mental illness last year (12), but told a prying reporter she was tired of talking about the issue during a U.S. breakfast show interview in December (12).

When asked for an update on Good Morning America, she snapped back, "You know what? I'm sick of talking about it because I never wanted to be the poster child for this. I never wanted this to come out publicly. It came out.

"I dealt with it in the best way I could and that was just saying that, 'Look, hey, I'm bipolar'. Everyone has things going on and we're doing the best we can. We can't jump from the rooftops shouting about, 'I have this, look at me, victim' - no. We all have issues in life and I'm really happy I have great friends, great support, and that's all I can do."