Catherine Zeta-Jones has admitted that nobody thought her marriage to her husband Michael Douglas "would ever last" ahead of their 25th wedding anniversary.

The 55-year-old and the Hollywood actor, who tied the knot at New York's Plaza Hotel in 2000, share a 25-year age gap – a point of concern for those close to the Welsh star at the time.

© Getty Images The couple share a 25-year age-gap

"We’ve been married 25 years, it’s something to celebrate. And they said it would never last," Catherine told The Sun .

"It’s a journey of learning and loving and fun, and the prospect of reaching a 25-year anniversary is really quite thrilling. I remember my mum and dad celebrating theirs."

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