Here’s one way to send Kim Kardashian into a tailspin.

In a clip from the upcoming new series Kocktails With Khloé, host Khloé Kardashian, 31, has her special guest Kendall Jennner, 20, prank call their 35-year-old sister and announce that she is pregnant.

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kendall jenner

Kendall Jenner.

“Are you kidding?” Kim asks. “Were you calling looking for mom?”

“No,” Kendall says. “I was looking for you because I didn’t know who to tell first and I felt like if I told mom she would freak out, so I was coming to you for support first.”

“I mean, I don’t even know,” Kim replies, adding she didn't exactly have an enjoyable pregnancy with her second child, Saint.

Find out what happens next in the video below and watch Kocktails With Khloé tonight on FYI!