Michael Douglas cites his late father and Hollywood legend Kirk Douglas as a major inspiration, but like all families, the pair had their ups and downs.
Speaking to The Guardian in 2016, the A-lister explained: "Whichever way you cut it, Kirk was a man who cast – who still casts, aged 99 – an extremely long shadow. He was, and is, incredibly dynamic, larger than life, sometimes aggressive, a very masculine man who loved women, as my mother quickly discovered.
"Within 18 months of him being in California, she had seen and read enough to call time on the marriage. They divorced [in 1951] when I was seven and my younger brother, Joel, four."
Michael and Joel went on to live with their mother, actress Diana Dill and stepfather Bill Darrid, but the Ant-Man star and his brother would spend the holidays with Kirk.
"We would visit him on set. I had my 16th birthday in Los Angeles. Hayley Mills was my date. Or we would go to Kirk's house in Palm Springs where Joel and I became the Desert Rats, riding horses out into the countryside," Michael noted.
"People such as Burt Lancaster, Frank Sinatra and Tony Curtis would drop by. All of that left a lasting impression although, looking back, I can see that Dad was film star first, father second. We were much more emotionally attached to our stepfather."
Michael and Kirk's relationship, at times strained, improved later in life. "Michael didn't like me much after his mother and I got divorced. It was only when he started acting that we became close," Kirk previously admitted.
Reflecting on his father's influence on his life and career, Michael shared the best advice he ever got from his dad. "Whatever you do in life, just do it to your utmost ability," he recalled to ET. "Do it with full commitment, and then, screw it. If it doesn't work out, move on. But, you know, you left it with the idea that there is nothing more you could have done."
After rebuilding their relationship, Michael and Kirk became closer than ever, with the Spartacus star spending plenty of time with his daughter-in-law, Catherine Zeta-Jones, and grandchildren Cameron, Dylan and Carys Douglas.
When Kirk passed away in February 2020, Michael was the first to share the news. Posting a carousel of family photos, he began: "It is with tremendous sadness that my brothers and I announce that Kirk Douglas left us today at the age of 103.
“To the world he was a legend, an actor from the golden age of movies who lived well into his golden years, a humanitarian whose commitment to justice and the causes he believed in set a standard for all of us to aspire to.
"But to me and my brothers Joel and Peter he was simply Dad, to Catherine, a wonderful father-in-law, to his grandchildren and great-grandchild their loving grandfather, and to his wife Anne, a wonderful husband.
"Kirk's life was well lived, and he leaves a legacy in film that will endure for generations to come, and a history as a renowned philanthropist who worked to aid the public and bring peace to the planet. Let me end with the words I told him on his last birthday and which will always remain true. Dad – I love you so much and I am so proud to be your son."