- Zelda Williams (@zeldawilliams) August 12, 2014
The 25-year-old actress and gamer posted the quote from French writer Antoine de Saint-Exupéry, best known as the author of The Little Prince, adding: "I love you. I miss you. I'll try to keep looking up. Z".
Coincidentally, Williams' last activity on social media was an Instagram post commemorating Zelda's 25th birthday. Using the 'Throwback Thursday' hashtag, he attached a cute black and white snap of the pair taken when Zelda was a toddler.
- Robin Williams (@robinwilliams) July 31, 2014
Robin Williams was discovered dead at his home near San Francisco yesterday at around 11.55am local time. He was 63. Police suspect the death was a suicide by asphyxiation.
A spokesperson, Mara Buxbaum, this morning released a statement saying that Williams had recently been undergoing an episode of 'severe depression'.
The actor's struggles with addiction and depression were well known. After beating a long-running cocaine problem in the early 1990s, he continued to battle with alcoholism, checking into rehab in 2006 and 2010.
A legendary stand-up and star of hit films such as Mrs Doubtfire and Good Morning Vietnam, Williams was famously hailed by Entertainment Weekly as the 'funniest man alive'.
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But Williams will perhaps be best remembered for his dramatic turns in award-winning dramas like Good Will Hunting. A three-time Oscar nominee, he finally took home an Academy Award for Best Supporting Actor in 1997 for his role as an inspirational teacher in Dead Poets Society.
As well as Zelda, Williams was also father to two sons, Zachary, 31, and 22-year-old Cody Allen. He had previously mentioned the birth of his children as motivation to conquer his cocaine addiction in the early 1990s.
The actor's wife, Susan Schneider, whom he wed in 2011, is the only one of the family to release a public statement so far. Describing herself as 'utterly heartbroken', she asked that the family be granted privacy to grieve.
"This morning, I lost my husband and my best friend, while the world lost one of its most beloved artists and beautiful human beings," she said.
"As he is remembered, it is our hope the focus will not be on Robin's death, but on the countless moments of joy and laughter he gave to millions."