Kirk Douglas offers words of wisdom to Catherine Zeta-Jones and Michael Douglas as the couple celebrate their 19th wedding anniversary

Their relationship has stood the test of time.

And Catherine Zeta-Jones shared a heartfelt post to Instagram on Monday morning to commemorate her 19th wedding anniversary to Michael Douglas. 

The 50-year-old actress posted a glamorous black-and-white snap from their early days of dating and made sure to include a few words of wisdom shared by her father-in-law, Kirk Douglas, 102, the Daily Mail reports. 

Michael and Catherine appeared to be just a couple of kids in love as they danced the night away in one snap.

“Dancing in to our 20th year! Happy Anniversary my love,' she captioned the series. 'Such a beautiful letter from my father in law. I am touched.”

On personalized stationery, Kirk made sure to send his best regards to Michael and Catherine as they celebrated two decades of wedded bliss.