It's a special day in their household as while Douglas reached his 76th year on Friday, his wife turned 51 years old on the same day.
Although, Zeta-Jones jokingly listed all the other famous faces she shares a birthday with before mentioning her spouse.
The Chicago star referenced actors Will Smith and Heather Locklear, broadcaster Barbara Walters and hairdresser Serge Normant, including pictures of them in her Instagram post.
"I am so honored to be born on the same day as all these talented people! Happy Birthday Will, Heather, Serge, Barbara and OF COURSE the father of my children and my husband Michael ❤️," she wrote.
The mother-of-two also shared a loving tribute to the late Superman star Christopher Reeve who was also born on the date.
"And to the “man of steel” our dear friend Christopher, you are always in our hearts and never forgotten. Happy Birthday my fellow Libras!" she added.
Meanwhile, Douglas shared a video of a series of photo of himself and his wife set to Green Day track Good Riddance (Time of Your Life).
Read more: Hollywood pays tribute to Kirk Douglas
He captioned his Instagram dedication: "Happy Birthday Catherine! I bet you are glad this year is over! Here’s to the future ❤️ @catherinezetajones."
The happy couple will celebrate 20 years of marriage later this year as they tied the knot in November 2000. They are parents to one son, Dylan, 20, and 17-year-old daughter Carys.
Watch: Catherine Zeta-Jones reflects on 30 years of fashion