Robin Williams' son Zak has paid tribute to his father on what would've been his 70th birthday.
The acclaimed actor and comedian, who starred in films such as Mrs Doubtfire and Dead Poets Society, took his own life in 2014 at the age of 63.
It was discovered after his death that he had been suffering from Lewy body dementia, which his wife Susan Schneider described as “the terrorist inside my husband’s brain”.
His eldest son Zak, whose mother is Williams' first wife Valerie Velardi, remembered the star via an Instagram post on Wednesday 21 July.
“Dad, on what would be your 70th birthday, I would want you to know that your incredible spirit lives within us,” he wrote alongside a black-and-white picture of his father.
“Our family will be celebrating you and your memory today. We miss you and love you always!" he said.
Prior to his passing, Williams had been misdiagnosed as suffering with Parkinson's disease.
In a recent appearance on podcast The Genius Life to talk about his father's death, Zak opened up on the "frustration" he saw over the actor’s misdiagnosis.
“What he was going through didn’t match one to one (with what) many Parkinson’s patients experience,” he said. “So, I think that was hard for him.”
Zak added: “There was a focus issue that frustrated him, there were issues associated with how he felt and also from a neurological perspective he didn’t feel great. He was very uncomfortable.”
In addition to Zak, Williams was also survived by the two children from his second marriage to Marsha Garces, daughter Zelda and son Cody.
With additional reporting by PA.
Watch: Robin Williams wrote to school that wanted to drop Mrs Doubtfire co-star