Frances, who lost her own father Kurt Cobain when she was a toddler, tweeted Zelda after she posted a tribute to Robin on Instagram.
Just Jared reports that photoshopped images of the actor were among the vile messages sent to Zelda.
I'm sorry. I should've risen above. Deleting this from my devices for a good long time, maybe forever. Time will tell. Goodbye.— Zelda Williams (@zeldawilliams) August 13, 2014
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“Dad was, is and always will be one of the kindest, most generous, gentlest souls I've ever known, and while there are few things I know for certain right now, one of them is that not just my world, but the entire world is forever a little darker, less colourful and less full of laughter in his absence,” Zelda’s statement reads. “We'll just have to work twice as hard to fill it back up again."
A number of celebrities have paid tribute to Robin on Twitter, including Ricky Gervais, who wrote: “I am deeply saddened. He was a lovely man who would keep everyone laughing even if he wasn't feeling good himself. RIP Robin Williams.”
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