Dyrdek couldn't help but share the happy news on Instagram, along with the sweet first photo of his little man.
"Say hello to Kodah Dash Dyrdek aka Dash aka KD aka K-Dash aka Dah-Da… Born 9/9/16 on 7:28pm… 7.7 ounces," he wrote. "Myself and @bryianadyrdek_ feel so incredibly blessed and thankful for our healthy baby boy."
The two first announced they were expecting in March.
"I am so happy to announce my beautiful wife is pregnant with our first child. We are so blessed, so happy and look forward to bringing an amazing young boy into this world," Drydek posted to Instagram.
"I can't help but believe the world really could use more Rob Dyrdek's. So I feel incredibly blessed and actually proud that we get to bring another great man like him into this world. We love you so much, Baby Boy!! And we can't wait to meet you," Bryiana added.
Dyrdek and his model wife tied the knot in Sept. 2015.