Catherine Zeta-Jones and Michael Douglas, who are celebrating their 21st wedding anniversary. The couple - now parents to two children together - tied the knot at the Plaza Hotel in New York on 18 November 2000.MORE: Catherine Zeta-Jones and Michael Douglas look so in love as they celebrate wonderful news togetherAnd to mark their special day, Michael shared a beautiful montage clip, including unseen family photos from their time together and sweet wedding photos.