Taking to Instagram on Tuesday, the Keeping Up With The Kardashians star captioned a picture of her baby daughter: 'stormi webster 👼🏽'
Kylie's boyfriend Travis' real name is actually Jacques Webster, and the 25-year-old rapper regularly goes by his stage name - Travis Scott.
Many had believed that the newborns name would be Posie, short for Mariposa, meaning 'Butterfly' as Kylie and Travis both have a shared interest in the insect.
Not only do the couple share matching butterfly tattoos, but Kylie is regularly seen wearing the insect on jewellery, as well as Scott's song Butterfly Effect being his most successful hit.
Travis and Kylie managed to keep the pregnancy a secret for a whole nine months, until Stormi was born on February 1.
The 20-year-old beauty mogul announced the news on February 5th with an emotional post explaining why she had kept her fans 'in the dark' and that her pregnancy had been the most 'empowering' journey.
You can watch Kylie's full announcement below.