Kirk Douglas, known as one of the most beloved tough guys in Hollywood history on screen and a defender of blacklisted artists off screen, died Wednesday at age 103.

The actor’s son, Michael Douglas, announced his death on behalf of the Douglas family Wednesday in an Instagram post.

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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. #KirkDouglas

A post shared by Michael Douglas (@michaelkirkdouglas) on Feb 5, 2020 at 3:33pm PST

The honorary Oscar recipient is survived by his wife Anne Buydens, and three sons, Michael, Peter, and Joel Douglas. His youngest son Eric, died in 2004 of what was ruled an accidental drug overdose.

Sending condolences to the family. Rest in peace, Kirk.