Rob Kardashian and Blac Chyna have just revealed the sex of their baby and we are so excited for them.

The pair made the revelation during yesterday night's, September 11, 2016, premiere of Rob & Chyna. In the show, we see the pregnant E! star and her Rob make a doctor's appointment to find out the sex of their baby.

"I'm pretty nervous. I'm excited," Rob says, adding, "I really want a boy."

Then the doctor announces, they are having a girl. "Rob, it's a girl!" Chyna exclaims excitedly. "Oh, that's crazy," Rob adds.

"You have a boy at home, right?" the doctor asks them, referring to Chyna and Tyga's son King Cairo.

"Yeah, but I don't," Rob says. "That's OK, this is your first," the doctor reassures Rob.

"It's an emotional moment. Me wanting to have a boy, it definitely stems from my dad but I'm sure I'll have the same relationship that I had with my father with my daughter," Rob says. "I'm just happy that the baby's healthy and I'm gonna be super happy with a girl."

Now, the question on everyone's lips is what the latest Kardashian girl will be named.

Whatever they call her, we know it would definitely not be starting with a 'K'!

During a Facebook Live chat last month, Rob and Chyna revealed they might be carrying the family tradition.