Michael Douglas left fans puzzled after calling his wife, Catherine Zeta-Jones, his “birthday sister” in a recent post. The couple, who both share the same birthday on September 25, have long been admired for their enduring Hollywood romance. This year, Douglas turned 81 while Zeta-Jones celebrated her 56th birthday.

Douglas shared a photo of the pair on the golf course, writing, “To my birthday sister — what a joy celebrating another year with you!” He went on to congratulate Zeta-Jones on her game at the Celebrity Ryder Cup before adding, “Happy Birthday to the love of my life.” Fans quickly flooded the comments, with many confused by his affectionate phrase.

Fans Question the “Birthday Sister” Remark

Several social media users were left scratching their heads over Douglas’s choice of

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