The pregnant reality star announced she was having a daughter on Sunday night's episode of 'Keeping Up With The Kardashians'.
The couple have managed to keep the sex of the baby under wraps up until now - even going so far as to buy all white baby clothes so people wouldn't guess.
But as she let the cat out of the bag, Kim said: "I'm so excited to be having a girl. Who doesn’t want a girl?
"I know that's really what Kanye has always wanted. He wanted a little girl.
"What kind of child will I have? A very tutu-y, like, princess?"
Kim and Kanye are due to welcome their first child together in the summer.