"In an instant, our universe burst wide open and nothing would ever be the same," Kazee wrote on Instagram, along with a photo of the baby boy's hand. "Welcome to the earth star child."
As fans may recall, Dewan shared the exciting pregnancy news in late September 2019.
"Becoming a mother is quite simply the absolute best most incredible thing that has ever happened to me @stevekazee you are a gift from above and i couldn't be more excited to be expanding our family together," she wrote.
The two first sparked relationship rumors in Halloween 2018 and made their relationship Instagram official in June 2019.
Since then, the two have been inseparable and head over heels with one another.
Most recently, the two shared just how in love they were for Valentine's Day this year. "You flew into my life like a rocket, lit it up beyond what i could've expected or imagined, and every day i am in awe over the love, care and nurture you show me, Evie and everyone around you. I've told you a thousand times and I'll tell you again..Thank you for finding me i am the luckiest girl alive," wrote Dewan on Instagram, alongside a picture from her maternity shoot.
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