Khloe Kardashian Reveals She's Pregnant with a Girl

Khloe Kardashian is pregnant with a baby girl -- and she waited until the season finale of 'KUWTK' to make the announcement.

The big news was revealed on Sunday night's episode -- during which Kylie Jenner was first told Khloe was preggo with a little girl by Khloe's doctor. Kylie told Khloe, who didn't seem to believe it, saying she was hoping for a boy.

But the still-expecting mom confirmed her baby's sex in a tweet soon after ... saying she was happy to be bringing another Kardashian girl into the world. As we reported ... Kylie recently gave birth to her own daughter, Stormi, and Kim's surrogate delivered baby Chicago not long ago either.

That's 3 for 3 now for the new mamas. Congrats to Khloe and Tristan!