Catherine Zeta-Jones received treatment for bipolar disorder after 'stress of last year'

Catherine Zeta-Jones has revealed she sought treatment for manic depression after coping with her husband Michael Douglas' recent cancer battle.

"After dealing with the stress of the past year, Catherine made the decision to check in to a mental health facility for a brief stay to treat her bipolar II disorder," her publicist said in a statement.

"She's feeling great and looking forward to starting work this week on her two upcoming films."

While it has not been confirmed where Catherine received her treatment – nor when she was diagnosed – it is being reported that she spent time in a £770-a-day detox centre in Connecticut.

A friend of the 41-year-old actress (pictured in March) told People magazine: "There's no doubt it's been a stressful year, Catherine has had to deal with Michael's illness and that's been hard.

"She went in for a few days because she's about to start working, and wanted to make sure she's in top form, which she is."

Wall Street star Michael, 66, announced back in January that doctors had declared him cancer-free after what he described as a "wild six-month ride" of chemotherapy and radiation battling stage four throat cancer.

The Oscar-winner – who has two children, Dylan, 10, and Carys, seven, with Catherine - also revealed how his wife had been overcome with emotion on hearing of his recovery. "She had a good cry when she heard," he said.

Bipolar disorder is the technical name for manic depression and is marked by wild mood swings, from feelings of despair to high or manic feelings of joy.

People with bipolar II tend to suffer more with depression, and their 'up' periods are less elevated.