The aspiring actress lost her father last summer (Aug15) and as the anniversary of his suicide looms, the 25 year old prepared for another painful day.

Zelda took to Instagram on Monday night (20Jul15) and posted a shot of a cloudy sky, writing, "I will be taking a break from social media in the coming weeks. It's a time better served away from the opinions or sentiments of others, and I appreciate your understanding.

"In my absence, I understand there will be those who wish to leave messages regarding Dad on my board, but please attempt to be respectful and kind to one another in the process, both because I will not be here to delete or mediate trolling, and because kindness is in short supply these days anyhow."

Zelda previously deactivated her Twitter account shortly after her father's death after sick hoaxers began circulating a picture which they claimed was of her father's dead body.

Williams' daughter wasn't the only one remembering her dad on his birthday - his The Crazy Ones co-star Sarah Michelle Gellar also shared a touching photo of herself with her onscreen dad on Instagram, along with the caption: "Smile, though your heart is aching Smile, even though it's breaking Happy Birthday RW."

Her simple message features the lyrics from Charlie Chaplin's standard Smile.