Zelda Williams paid tribute to her late father, comedian Robin Williams, today (July 21) on what would have been his 65th birthday.

Zelda posted a black-and-white photo to Instagram of herself and brothers Zak and Cody with the late actor, when all three kids were much younger.

"Still not really sure what to do on days like today…" she wrote in an accompanying caption. "I know I can’t give you a present anymore, but I guess that means I’ll just have to keep giving them in your name instead."

Zelda continued, saying she donated money to the charity Freedom Service Dogs in her father's name, as she's certain he would've approved of it.

“This year, I tried to help three causes you care about in one; rescue dogs, people suffering from disabilities, and our nation’s wounded veterans, so I donated to freedomservicedogs.org," Zelda wrote. "They rescue pups from shelters and train them so that they can be paired withs someone in dire need of their help and companionship.”

"Thought you’d get a kick out of furry, four legged friends helping change the world, one carrier in need at a time,” she continued.

She then wished her late father a happy birthday before signing off, writing, "Happy birthday Poppo. Shasha, Zakky, Codeman and I all love you and miss you like crazy. Xo."

Robin Williams was found dead in his home on August 11, 2014, of an apparent suicide. He reportedly hanged himself in his San Francisco home and did not leave behind a note. He was 63 years old.

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