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Getting so big!

Dancing with the Stars pro Peta Murgatroyd shared a sweet snapshot of son Shai holding up a sign that read, “Today I am 12 weeks old,” while resting on an elephant stuffy.

“I’m officially obsessed #3monthsold #babychmerkovskiy,” the new mom, 30, Instagrammed the image of her baby boy.

In February Peta and husband, fellow DWTS pro Maksim Chmerkovskiy, introduced their newborn son.

Chmerkovskiy and Murgatroyd welcomed their first child on Jan. 4, they announced via social media.

“Shai Aleksander Chmerkovskiy 01/04/17 5:34am,” the new dad announced.

Continue looking through our gallery to see more pics of baby Shai…

I’m officially obsessed #3monthsold #babychmerkovskiy

A post shared by Peta Murgatroyd (@petamurgatroyd) on Apr 5, 2017 at 8:18am PDT

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