It’s been four months since Robin Williams tragically passed away from suicide — but for his friends and family, the loss remains ever present.

“I miss him all the time,” Robin’s eldest son, Zak Williams, 31, told ‘People’ in a new interview.

“There’s not a day that goes by that we don’t think about our dad,” Zak added, speaking on behalf of himself and his siblings Zelda Williams, 25, and Cody Williams, 23.

robin williams' kids

Zak, Zelda and Cody honored their dad by throwing out the ceremonial first pitch before Game Five of the 2014 World Series in October.

Zak — whose mother is Robin’s first wife, Valerie Velardi — noted he is reminded of his late father’s legacy on a day-to-day basis.

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“Often I see something or if I’m watching a film, I think, ‘Oh, man, he would have appreciated this’ or ‘He would have gotten a laugh out of this,'” he added.

zak & robin williams

Zak with Robin in April 2012.

Since Robin’s death on Aug. 11, the beloved actor’s firstborn says he has become dedicated to honoring his dad’s love of giving back to the community.

“It’s through helping others that I’ve begun to heal,” said Zak, who often volunteers at a local prison.

To read the full story on Robin, pick up the new issue of ‘People,’ on newsstands Friday, Dec. 19.