Kutcher, 36, took to his official website on Thursday night to post this sweet message:
“Mila and I would like to welcome Wyatt Isabelle Kutcher to the world. May your life be filled with wonder, love, laughter, health, happiness, curiosity, and privacy.”
The proud new papa also shared eight baby photos (including a few of some very cute baby animals) and challenged the world to a little game:
“Can you guess which one is ours, or does it really matter? All babies are cute. – Ashton.”
Kunis, 31, gave birth to little Wyatt on Tuesday at Cedars-Sinai Hospital in Los Angeles, with Kutcher by her side.
This is the first child for the engaged couple.