She's officially a daddy's girl!

Ashley Hamilton welcomed daughter Willow on Tuesday, and shared a sweet photo sleeping with the adorable newborn on Instagram.

MORE: Khloé Kardashian Tells Kylie Jenner to Have a Baby ASAP!

"Oh man that birth was tough," he jokingly captioned the black-and-white image of the father-daughter duo.

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This is the first child for the 42-year-old son of Hollywood icon George Hamilton and his girlfriend, Renee Karalian.

Congrats!