"So excited to welcome our baby boy into the world ... he's 7 lbs 12 oz, beautiful, healthy and we couldn't be happier," Zoe, 42, writes.
After weeks of speculation that she was expecting, Zoe confirmed the pregnancy in September. Since then, she and Berman have been preparing big brother Skyler Morrison, 2½, for his latest role — one that, up until recently, he was still unsure about.
"It depends what day you ask him. Right now he just doesn't want anyone near Mommy except him, so I don't know when that should change," she told PEOPLE this fall.