Zeta-Jones posted a photo of her and Douglas to her Instagram page wishing her husband a happy anniversary.
"Happy Anniversary dearest Michael!" wrote the actress. "Loving our life together, here's to the next 15!"
Douglas, 71, and Zeta-Jones, 46, were married on Nov. 18, 2000. Though the couple had a brief public separation in 2013, Douglas and Zeta-Jones reunited in 2014, and an interview with ABC News this past July, Douglas revealed that his family life is "great."
“Life for me, I’m alive, I’m healthy. Catherine and I are great," Douglas said. "We’re celebrating our 15th anniversary ... and my kids are all great.”
Douglas and Zeta-Jones have two children together, 15-year-old Dylan and 12-year-old Carys.