Nikki Bella is such an excited aunt-to-be!

The reality star took to Instagram on Thursday to repost a photo of sissy Brie Bella's baby bump, and shared a heartwarming update on the little bun in the oven.

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"Felt the baby girl kicked today for the first time! It was amazing! Emotional! Crazy! Just beautiful!" she said.

It looks like Brie is almost ready to pop! The former professional wrestler announced her pregnancy with husband Daniel Bryan over the summer.

Most recently, Brie shared a sonogram photo of her little bundle of joy — she's having a girl! — via Instagram, and couldn't contain her excitement over her little princess in the photo's caption.

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"Words can't describe the feelings you get when you experience these moments," the mommy-to-be captioned back in December. "I'm just filled with so much happiness after seeing my little girl yesterday."

The mommy-to-be never shies away from showing off her growing bump on social media, and you could see more photos of her belly by clicking through the slideshow!