The Chicago star then shared that her daughter had actually texted her in the early hours of her own birthday to thank her for giving birth to her.
“That’s the kind of woman you are,” Zeta-Jones added.
“Kind. Your wisdom outnumbers your years. [Your] beauty is deep and your heart is big enough to love and envelop the world, your sense of humour … very important … is insurmountable.”
The actress then finished the post with a small quip, joking, “Your Japanese needs some work, but that’s doable,” and concluded, “I love you angel. Mama.”
Carys was appreciative of the post, commenting, “I love you my mamma! Thank you for all that you do.”
Meanwhile, Douglas, 76, did not miss out on an opportunity to give his daughter a shoutout on her special day.
He captioned a photo of the pair all dolled up, saying, “Honey this is your Dad, wishing you the best 18th birthday any young lady could possibly have. You know how much I love you, how proud I am of you, and the joy I have watching you grow into the young lady you are turning out to be! Happy birthday Carys! I love you! Dad.”
Carys replied, “Thank you my dadda!! I love you and thank you for everything you do. You are my biggest inspiration!”
Zeta-Jones and Douglas have been married since 2000. They share two kids: Carys and Dylan Michael Douglas, 20.
Douglas’ son from his first marriage to film producer Diandra Luker, Cameron Douglas, also wished his half-sister a happy birthday on Tuesday.
“Happy Birthday to a remarkable young woman, sister, aunt, intellectual, and all-around lovely human being,” he captioned a pic of Carys with his own child on Instagram. “I could not be more proud of the person you are and the trajectory your star is traveling.”
This article originally appeared on Page Six and was reproduced with permission