Grimes declined to reveal the gender of her unborn child during a Twitter Q&A with fans.

The 31-year-old pregnant pop star took to social media on Friday and referred to her baby as 'they' when a fan asked 'you will have a girl or boy?'

'They may decide their fate and identity,' replied the Oblivion hitmaker - who is expecting her first child with boyfriend Elon Musk.

Grimes calls her unborn child 'they' as she reveals she will not disclose her baby's gender

No gender reveal: Grimes has declined to reveal the sex of her unborn child

Also on Friday, the artist - who earlier revealed she is seven months pregnant - echoed the comments during a YouTube livestream.

'I don't want to say the gender of the baby… because I feel like their privacy should be protected.'

'I don't think they can consent to being famous or being in public,' said the Miss Anthropocene artist.

'And I don't want to gender them in case that's not how they feel in their life. I don't know, I just feel like it doesn't need to be known.'

AMA: Grimes -whose real name is Claire Elise Boucher- also fielded questions on music and fashion, among other topics

Grimes also revealed during the livestream that she has already picked out a name for her offspring.

'I have a name for the baby, but I don't want to say what it is because everyone I've told it hates it, and everyone's gonna make fun of it,' she admitted.

'But it is, in fact, a genius name and people just don't appreciate it yet because it's too avant-garde.'

Candid: Grimes revealed her fears about becoming a mother for the first time

Rave: '[W]ill you ever collab with Lady Gaga?' asked one curious fan, to which Grimes replied, 'If she'd have me ps her new album is f**king good'

Fashion faves: And when asked about her 'style icons' the singer-songwriter replied, 'Bella Hadid and Kim Kardashian are rly cool [sic]'

Grimes - whose real name is Claire Elise Boucher - also fielded questions on music and fashion, among other topics.

'[W]ill you ever collab with Lady Gaga?' asked one curious fan, to which Grimes replied, 'If she'd have me ps her new album is f**king good'.

And when asked about her 'style icons' the singer-songwriter replied, 'Bella Hadid and Kim Kardashian are rly cool [sic]'.

The Canadian indie singer has been in a relationship with tech tycoon Musk, 48, since May 2018.

The billionaire venture capitalist is already a father to five sons from his marriage to first wife author Justine Wilson.