Watch Kim Kardashian Unintentionally Reveal Sex of Third Baby

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North and Saint are getting a little sis.

While out and about promoting her latest KKW Beauty launch, a collection of three gardenia-inspired scents that are available online today, Kim Kardashian accidentally revealed the sex of her third baby.

The 37-year-old casually let it slip that she and Kanye West are expecting a baby girl during an appearance on the Ellen DeGeneres Show on Tuesday. While explaining how she used her recent baby shower to prepare North and Saint for their new sibling, Kardashian said, "People brought toys and gifts and [North] was opening them all up the next day, and she said, 'Mom, since baby sister's not here, I think I need all of her toys in my room and I'll play with them and make sure they're OK for baby sister." 

DeGeneres followed up, "She's a toy-tester, and you just told us it's a girl!" 

During the season premiere of Keeping Up with the Kardashians, which aired last September, Kardashian officially confirmed that she was using a surrogate to carry her third child due to past pregnancy complications that made it unsafe for her to carry a baby herself. However, this is the first time she has confirmed reports that the baby is a girl.

According to Kardashian, she and West have not yet picked a name. "We're freaking out, we don't have a name," she confessed to DeGeneres. The comedian, of course, had a few suggestions of her own, including "Lip-Kit West," and "Star West." 

"It's so hard, and I do like different names — short, easy to spell, one syllable," Kardashian added. According to reports, the baby is due before the end of the year, so she's got some time to figure it out.