@stacykeibler / Instagram 1 / 6
@stacykeibler / Instagram 1 / 6

Happy Mother's Day to soon-to-be-mom Stacy Keibler!

The pregnant star, 34, celebrated a very significant Mother's Day on Sunday, May 11, in anticipation of the birth of her first child, due this summer.

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Keibler posted a sunny shot to her Instagram in recognition of the holiday, showing her bare baby bump. In the image, George Clooney's ex-girlfriend cradles her tummy, with her massive engagement ring sparkling on her left hand. She wears a crocheted crop top over a white bikini and shields herself from the sun with a fedora and a pair of aviator sunglasses.

"Can't wait to spend next #MothersDay with this little angel in my arms #happymama #babybump" she captioned the photo. Keibler is expecting a daughter with husband Jared Pobre, whom she wed in Mexico on March 8.

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When she wasn't sunning her growing belly this weekend, Keibler spent time with her family. The former "Dancing with the Stars" contestant put up another photo, this time in a sundress, with the women in her life.

"Spending my first #MothersDay with my #Mommas," she wrote. "#desertliving #happy #family #Poblers."

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