(CNN) Shay Mitchell is now a pretty little mama. 

The star of "Pretty Little Liars" and "You" announced the arrival of her first child Sunday on her official Instagram account. 

Mitchell posted a photo showing her holding the hand of her newborn. 

"Never letting go," the caption read. 

The 32-year-old actress and her 38-year-old boyfriend Matte Babel kept the pregnancy under wraps before they made the announcement in June on YouTube. 

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