Some individuals were taken aback upon discovering the unique nickname Michael Douglas uses for his wife.
In relationships, nicknames can often be endearing and affectionate. However, this celebrity duo caught many off guard when they shared one of theirs, highlighting a mutual trait they share.
Both actor Michael Douglas and actress Catherine Zeta-Jones celebrate their birthdays on the same day, September 25, a fact that many fans were not previously aware of.
While this coincidence isn’t too extraordinary, Douglas’s way of addressing his wife of nearly 25 years raised some eyebrows.
In a post celebrating their shared birthday on Instagram, Douglas included a heartfelt message alongside a photo of them together.
His message read: “To my birthday sister—what a joy celebrating another year with you! Congratulations on your spectacular game at the Celebrity Ryder Cup. Happy Birthday to the love of my life @catherinezetajones.”
While many followers were busy showering the couple with birthday wishes, some were puzzled by the phrase ‘birthday sister,’ finding it a little unusual.
One person commented: “Did you just call your wife sister or am I tripping?”
Another remarked: “That’s his wife, not his sister, what does he mean by birthday sister.”
In response to the post, Zeta-Jones expressed her gratitude to her husband but did not disclose any nicknames she might have for him.
She replied: “Happy birthday darling. I can’t think of anyone else to share a birthday with.”
On her own social media account, she paid homage to their relationship by sharing nostalgic photos from throughout the years.
She captioned it: “Happy birthday Michael! Sharing this special day with you is once in a lifetime!”
Meanwhile, other fans seemed less concerned with the birthday sister comment and instead focused on the heartwarming images of the couple.
One fan commented: “Happy Birthday to my favorite Hollywood couple! My wish for you is to be happy, healthy and blessed! 🥂 To many more Birthday’s together! LOVE CONQUERS ALL!”
Another shared: “Hoppy Birdy Catherine & Michael wishes for fantastic health & happiness full of love always.”
Another well-wisher added: “Happy birthday to you two!! Much health, happiness and many years of life for you and enjoy this very special day.”
Finally, someone simply wrote: “Happy Birthday, both of you, beautiful couple!”