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Chrissy Teigen, John Legend, 2015 MTV Video Music Awards, VMA

Frazer Harrison/Getty Images

Are Chrissy Teigen and John Legend having a little boy or a little girl?

The pregnant supermodel revealed the sex of their bundle of joy tonight on Instagram, but it wasn't with a colored cake or balloons or anything that you might have become used to these days. In fact, it was kind of in passing.

Teigen was actually praising her new Vogue magazine cover, which was shot in her native country of Thailand, and in the caption, she shared that the couple are going to have a baby—wait for it—girl!

"So proud and honored to have shot the cover of Vogue Thailand! Special to me for so many reasons...one being I am SO PROUD to be Thai, so excited to have shot a Vogue cover (a dream, of course)," she wrote in the caption, "annnnd a couple minutes after this shot, John and I learned we were having our little baby girl!"

We already know this li'l lady is going to be the absolute cutest!

"Chrissy is feeling great!" a source close to the supermodel told E! News exclusively back in November of Teigen's pregnancy, adding, "John is being really supportive during Chrissy's pregnancy. It's so cool for [them] to see her belly grow."

The insider continued, "Chrissy is taking good care of herself and making sure everything is going well with the baby. She has been cooking for the holiday season! John and Chrissy will be with their families for the holidays. It's a really happy time for them."

The Sports Illustrated cover girl announced her pregnancy in October, taking to Instagram to write, "John and I are so happy to announce that we are pregnant :) As many of you know, we've been trying to have a baby for a while now. It hasn't been easy, but we kept trying because we can't wait to bring our first child into the world and grow our family."

And although there are some obvious nerves, Chrissy can't wait for this new journey. "Chrissy can't wait to be a mom. She is a little nervous but she knows that they will be great parents," the source noted. "It's a huge blessing for them both. John will definitely be making a few baby songs."