Michael Douglas and Catherine Zeta-Jones have separated after 13 years of marriage, sources told People.com.

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"They're taking a break," one insider told the celebrity news website about the Hollywood stars.

Word the couple have been spending time apart the past few months comes after Douglas, 68, recently battled throat cancer and Zeta-Jones, 43, was treated for bipolar II disorder.

"The stress has taken a toll on their marriage," a second source told People.com.

Neither star has officially filed for divorce or legal separation, the report said.

The couple are the parents of Dylan, 13, and Carys, 10.