She said she had given birth on 1 February and even apologised for not keeping her fans in the loop during her pregnancy.
Kylie's best friend, Jordyn Woods, praised her BFF's "growth and maturity" during her pregnancy, captioning an Instagram pic of the pair at Kylie's baby shower, "Your growth and maturity over this time never failed to amaze me".
She also released a video documenting the pregnancy and confirming rapper/ boyfriend Travis Scott as the baby's father.
"I love you my queen", one user wrote. I knew my baby would feel every stress and every emotion so I chose to do it this way for my little life and our happiness. Kim suffered with placenta accreta during her two pregnancies, which means the placenta's blood vessels attach too deeply to the uterus' wall, and can lead to complications such as blood loss and the inability to conceive again. Kylie recently posed for a magazine shoot, but is strategically holding a baby lamb in front of her.
After the reveal, Jenner's family ended their coy answers to people inquiring about the possible baby-to-be.
If you've been keeping up with the Kardashian-Jenner clan (who among us has not ― both inadvertently and intentionally), then you know rumors about Jenner's pregnancy have been swirling for months. The YouTube video has been titled as, "To Our Daughter".
In true Jenner-Kardashian form, she announced the news on Instagram on Sunday.
Kylie Jenner became a mother!
After months and months of secrecy, Kylie Jenner has announced she just gave birth!
"God is SO good! We are blessed beyond belief", Kris tweeted.
Khloe Kardashian is now expecting her first child with boyfriend Tristan Thompson.