AS she plans a huge celebration to mark her 25th wedding anniversary with Michael Douglas, Catherine Zeta-Jones is also laughing at the cynics who said their marriage was doomed.

The acting couple seemed an unlikely match at the start.

Welsh beauty Catherine was 28 and about to secure A-list status starring in 1998 movie The Mask Of Zorro with Antonio Banderas , after finding fame in the UK with wholesome ITV show The Darling Buds Of May.

Meanwhile, Basic Instinct star and ladies’ man Michael , then 53, had separated from first wife Diandra Luker, who he eventually divorced in 2000, and had done a stint in rehab for booze and drug issues in 1992.

But Catherine, now 55, recalled: “We’ve been married 25 years, it’s something to celebrate. And they said it would never last!

“It’s a

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