“I’m wearing my birthday suit! I’m running out of gift ideas!” she joked.

The elegant image, showing the actress wearing only high heels and messy hair, illuminated by the morning sun, left her fans in awe, with many commenting on how beautiful she looked.

Catherine Zeta-Jones, 55, posted a black-and-white photo of herself naked, posing in front of the bathroom mirror to commemorate her shared birthday with her husband, Michael Douglas.

“Let’s be fair, if Catherine looks like this now, every day is a birthday for Michael!” wrote a fan.

“Listen, if my body looks like this at her age, I’ll post all the nude photos and I won’t care what you think,” said another.

Along with the sensual post, Zeta-Jones shared a nostalgic photo from 25 years ago in New York. The couple was photographed by businessman and art collector Jean Pigozzi, celebrating their birthdays at 30 and 55 years old, respectively.

“Happy birthday to Michael and me!” she wrote in the caption. “This is how we looked on our birthdays 25 years ago! I love you with all my heart.”

Douglas also followed up with his own tribute, posting a beautiful photo of his wife and a touching video where Zeta-Jones, accompanied by Bono from U2, sang happy birthday while holding a modest cupcake with a single candle.