Michael Douglas claims Catherine Zeta-Jones has got her bipolar II disorder under control.

The Chicago actress checked herself into a clinic to monitor her ongoing battle with the condition - which can cause high and low mood swings, as well as depression - in April and now the Behind the Candelabra star admits his wife of 12 years is finally on the road to recovery.

"Sometimes you don't think you need any meds at all, and you forget your meds. Then all of a sudden, you get on a real ride. But she's fine. She's got it stabled out. She's doing great and I can't wait to see her," he said.

The 68-year-old actor - who has two children Dylan, 12, and 10-year-old Cary with Catherine - admits the mental health condition is unpredictable and can creep up on you at any time but insists the troublesome time has bought them closer together. "It's a slippery slope, this bipolar stuff," he added.