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Robin Williams' daughter ​Zelda heartbroken over death of Cathriona White

Robin Williams and daughter Zelda Williams arrive at the premiere of Walt Disney Pictures' "Old Dogs" held at the El Capitan Theatre on Nov. 9, 2009, in Hollywood, California.

Kevin Winter/Getty Images

Zelda Williams, the daughter of Robin Williams, weighed in on Twitter Tuesday following the death of Cathriona White, Jim Carrey's on-again, off-again girlfriend.

White, was found dead inside her home in Sherman Oaks, California, on Monday, authorities confirmed to ET, in what appears to be an apparent suicide. Police confirmed that a note had been found.

Williams wrote that she's "heartbroken to continue to watch sweet, kind souls be consumed by darkness."

She then posted a tweet about Pieta House, a suicide prevention facility located in Ireland, where White was born.

Williams, 26, lost her actor father last year when he took his own life at age 63.

Earlier this month, she posted a message on Instagram about grief, sadness and depression, just a little over a year following her dad's death. In it, she asked people who are suffering from depression to "hold on to the possibility of hope."