United Kingdom, Sept. 25 -- Michael Douglas and Catherine Zeta-Jones have shared gushing tributes to one another while marking their joint birthdays.

Both Michael and Catherine have their birthday on September 25, and this year turned 82 and 57 respectively, paying tribute to each other in adorable posts on Instagram.

Michael shared a picture of himself and Catherine on the red carpet, alongside an excerpt from his memoir One Helluva Ride!, about his stunning wife.

He wrote: "I had never fallen in love on a movie screen before. Until I saw Catherine. She was magic, in a way that went beyond beauty.

"And I was certain, as much as I had ever been about anything, that she was the one. It's the kind of moment that only comes around once i...