The transgender daughter of Elon Musk has slammed her father, accusing him of cruelty.

Musk had said he was "tricked by woke mind virus" into authorising trans-related medical treatment for Vivian Jenna Wilson when she was 16.

On social media and in an interview posted online, the Tesla CEO said his child was "not a girl" and referred to Wilson by birth name, saying his son was "dead".

Now, Wilson has hit back at Musk's claims, saying the billionaire hadn’t been tricked and that, after initially having hesitated, he knew what he was doing when he agreed to the treatment, which required parental consent.

Wilson told NBC News: "I think he was under the assumption that I wasn’t going to say anything and I would just let this go unchallenged...Which I’m not going to do, because if you’re going to lie about me, like, blatantly to an audience of millions, I’m not just gonna let that slide."

Wilson added that Musk was unsupportive, and was barely present in childhood.

The 20-year-old added: "He was cold...He’s very quick to anger. He is uncaring and narcissistic."

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Wilson and their twin brother were born to Musk’s first wife, author Justine Musk. The couple divorced in 2008, and with the parents sharing custody between their homes in the Los Angeles area.

On social media, Musk said that Wilson was "born gay and slightly autistic" and that, at age four, fitted certain gay stereotypes, such as loving musicals and using the exclamation "fabulous!" to describe certain clothing. Wilson denied these claims, though admitted to acting stereotypically feminine in other ways as a child.

Writing on Threads, a rival social media site to Musk's X platform, Wilson wrote: "He doesn’t know what I was like as a child because he quite simply wasn’t there...And in the little time that he was I was relentlessly harassed for my femininity and queerness.

"I’ve been reduced to a happy little stereotype. I think that says a lot about how he views queer people and children in general."

Musk's ex-partner, experimental electronic musician Grimes, came to the defence of Wilson. She wrote on social media: "I love and am forever endlessly proud of Vivian."

Wilson also defended puberty blockers, saying the treatment was lifesaving for her and other transgender people, telling NBC News: "They save lives. Let’s not get that twisted. They definitely allowed me to thrive."

The 20-year-old believes the requirements to obtain such treatments remain onerous, with teenagers pressured to say they’re at extreme risk of self-harm before they’ll be approved.