"Michael is going to announce the split soon. Catherine is fighting to save the marriage but he's had it," mirror.co.uk quoted a source as saying.
However, another report said that the 43-year-old actress is set to start a multi-million divorce battle.
The couple have not been pictured together in public for four months.
Earlier this week Douglas, 68, was pictured arriving in Sardinia, Italy, in a private jet but Zeta-Jones was nowhere to be seen.
They exchanged vows in 2000 and together have two children - Dylan Michael, 13, and Carys Zeta, 10.
--IANS (Posted on 25-08-2013)