Catherine Zeta-Jones has checked into rehab to be treated for bipolar disorder, her publicist confirmed.
The Welsh Hollywood star, 41, who is married to actor Michael Douglas, was treated after helping her husband battle against cancer.
Her publicist, Cece Yorke, said: "After dealing with the stress of the past year, Catherine made the decision to check into a mental health facility for a brief stay to treat her Bipolar II disorder. She's feeling great and looking forward to starting work this week on her two upcoming films."
The film star, best known for her role in the 1998 movie The Mask of Zorro, attended the Golden Globes awards ceremony in Los Angeles alongside her husband in January this year.
Douglas, 66, announced in the same month he had beaten throat cancer, which he was diagnosed with in August last year.
In September, the actor revealed his cancer had spread when he told US talk show host David Letterman that a biopsy had revealed he had "stage four cancer".
He underwent courses of radiotherapy and chemotherapy.
Zeta-Jones said at the time: "It makes me furious they didn't detect it earlier." And she told People magazine: "He sought every option and nothing was found. I knew something was up. He knew something was up."
Zeta-Jones, originally from Swansea, has been supporting Douglas and their two children, Dylan Michael and Carys Zeta, throughout the ordeal.
Her admission to rehab suggests the stress has taken its toll.