Kylie Jenner is one of the most famous people in the world, but she isn't afraid to keep certain aspects of her life private.

During part one of the Keeping Up With the Kardashians reunion, which aired tonight, June 17 on E!, the Kylie Cosmetics mogul opened up about why she kept her relationship with Travis Scott and her pregnancy private.

This isn't necessarily surprising as, in recent years, the 23-year-old businesswoman has kept her private life private.

On choosing to keep her pregnancy a secret, the KUWTK star noted at the reunion that she had already shared so much of her life with the world.

While the rest of the world may've been in the dark, Khloe Kardashian revealed it wasn't a secret among Kylie's family and friends, saying, "Like, it was very joyous in our private life."