The daughter of the late Robin Williams has returned to Twitter for the first time since the Oscar-winning actor's death.

Zelda Williams, 25, an actress and one of the comedian's three children, quit the social media website over online harassment following the suicide of her father.

On Monday she posted the words "thank you" on Twitter, linking to a quote from actor and playwright Harvey Fierstein that appeared to take aim at online bullying.

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"Never be bullied into silence," the quote said.

"Never allow yourself to be made a victim. Accept no one's definition of your life; define yourself."

Zelda announced she was going to quit using Twitter on August 12, the day after her father's body was discovered at his San Francisco Bay-area house.

She made the decision after at least two Twitter users sent her graphic photos that were visually manipulated to look like pictures of the dead Williams, according to media reports at the time.

She also complained of negative online comments from some other Web users.

"Deleting this (Twitter application) from my devices for a good long time, maybe forever," she wrote on Twitter on August 12.

A number of Web users posted messages of support for the actress after her father's death and after she quit the site.

Williams, who won an Oscar for his role in the 1997 drama Good Will Hunting, was one of the world's most well known stand-up comedians.

Reuters