Robin Williams' Son Zak Honors What Would've Been Actor's 73rd Birthday: 'Love You Forever'

“I'm so grateful to be your son,” wrote Zak Williams

The late Robin Williams would have turned 73 on July 21, and his son honored the occasion.

Zak Williams, 41, posted on X a black-and-white throwback photo of his father, who died in 2014 at age 63, sitting in a meditation pose.

“Dad, on what would be your 73rd birthday,” he wrote in the post, “I remember you for all the hope and joy you brought to the world.”

He continued, “There's not a week that goes by without someone sharing with me how you helped them through a dark time or a rough patch. I'm so grateful to be your son. Love you forever.”

Related: Prince Harry Bonds with Robin Williams' Son Zak Over 'Shared Experience' of Grieving a Famous Parent

Zak is one of the late Mrs. Doubtfire star’s three children. His mother is Robin’s first wife, Valerie Velardi, while Zelda, 34, and Cody Alan, 32, are the kids of his second wife Marsha Garces. 

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Last year for the big day, Zelda shared on social media that she believed Robin would have supported the Hollywood writers' and actor’s strikes, posting a photo of him on the picket line in the similar 2007 strike.

“Happy birthday to Poppo, who definitely would’ve been out there fighting the good fight for art and artists today and always,” the Lisa Frankenstein director wrote at the time.

In addition to honoring the late Oscar winner’s birthday, his kids have also posted remembrances on Aug. 11, the day he died. “These days are always hard and I love remembering you for being so very, very YOU,” Zak wrote in a 2023 Instagram post.

Related: Mrs. Doubtfire Child Stars Reunite Over 30 Years After Movie's Release: 'Still Feels Like Family'

Zak and his wife Olivia June share son McLaurin "Mickey" Clement and daughter Zola June.

In 2020, Zak opened up to PEOPLE about working in his father’s memory with Inseparable, an organization aiming to provide mental health care.

"I stay away from drugs and alcohol, I commit to support groups,” he said. "One thing I found very healing for me through my experience has been service and commitment to service work specifically around mental health and mental health support organizations.”

If you or someone you know needs mental health help, text "STRENGTH" to the Crisis Text Line at 741-741 to be connected to a certified crisis counselor.

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