“It is with tremendous sadness that my brothers and I announce that Kirk Douglas left us today at the age of 103,” Michael said in a statement obtained by PEOPLE. “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.”

The actor continued, “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.”

In November 2018, Douglas attended Michael’s induction at the Hollywood Walk of Fame in November — where the Basic Instinct star honored his father.

“It means so much to me, Dad, that you’re here today,” Michael said tearing up. “Thank you for your advice, inspiration, and I’ll say it simply and with all my heart: I’m so proud to be your son.”

In 1979, Michael told PEOPLE, “Kirk Douglas was certainly a hard act to follow. I mean, there he was hanging from the cross in Spartacus, walking across the ranks of oars in The Vikings …” Added Kirk: “I think having a famous father was a pain in the ass for him.”

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