The singer took to Instagram on Monday to share a picture with her boyfriend Alev Aydin and their newborn baby.
Halsey, 26, did not reveal the sex of their baby, but the couple have named the tot, believed to be a boy, Ender Ridley Aydin.
The Grammy Award winner wrote alongside their post: “Gratitude. For the most ’rare’ and euphoric birth. Powered by love.
“Ender Ridley Aydin. 7/14/202.”
Ender’s arrival comes as the Without Me singer is gearing up to release their new LP, If I Can’t Have Love, I Want Power, which is a concept record about “the horrors and joys of pregnancy and childbirth”.
Halsey posed with her nipple on display for the album’s cover, and later explained the move was a bid to help stop the “social stigma around bodies and breastfeeding”.
She said: “This album is a concept album about the joys and horrors of pregnancy and childbirth. It was very important to me that the cover art conveyed the sentiment of my journey over the past few months.
“The dichotomy of the Madonna and the Whore. The idea that me as a sexual being and my body as a vessel and gift to my child are two concepts that can co-exist peacefully and powerfully.
“This cover image celebrates pregnant and postpartum bodies as something beautiful, to be admired.
“We have a long way to go with eradicating the social stigma around bodies and breastfeeding. I hope this can be a step in the right direction!”