Robin Williams' kids celebrate late actor's 72nd birthday: 'Love u forever'

Robin William’s children are celebrating the legacy of the late actor on the eve of his birthday.

His son Zak Williams and daughter Zelda Williams took to Instagram Friday to pen heartfelt notes to their father on what would have been his 72nd birthday.

Robin passed away from suicide in 2014 at the age of 63.

"Happy 72nd Dad! Was remembering how much I used to love that look you'd give. That look with a mischievous, loving grin that your friends and loved ones knew so well. Joyous and curious and wondrous," Zak wrote alongside a throwback photo of the actor wearing headphones and smiling.

"Miss you and love you forever!" the 40-year-old added.

Meanwhile, Zelda looked back at her father’s principles, noting that the late actor would have backed the ongoing actor and writers’ strike.

"Happy birthday to Poppo, who definitely would’ve been out there fighting the good fight for art and artists today and always," Zelda tweeted alongside a photo of Robin on the New York picket line in the 2007 strike.

Robin was photographed holding up a sign that read ‘SAG WGA ON STRIKE’ as he stood alongside fellow protestors.

The Jumanji star was a vocal proponent of the rights of screenwriters, as he told The Hollywood Reporter in 2007: "This is not about millionaire screenwriters. They don’t need to be on strike. This is not about me, I’m fine.

"This is about a large amount of people who are simply trying to get their fair share," he shared. "You want to resolve it for their sake and get everybody back working and find a way to share it."

On August 11, 2014, Robin hung himself at his home in California following his struggle with depression and anxiety, as well as Parkinson’s disease.

He is survived by his two children from his first wife Valerie Velardi and his son Cody Alan Williams from his second wife.