"It's such a profound love," she said. "A couple of weeks ago I saw her discover her own toes and she wiggled them and her eyes got really big."

She shed the pregnancy pounds pretty quickly, too, thanks to a few simple techniques. "I have a trainer. I've just been lifting weights and breast-feeding," she explained. "And I eat really healthy and a lot, because I'm breast-feeding...always organic. I frequent Whole Foods. I never really cared so much about my diet until I got pregnant and had a baby."

Monaghan will next be seen in the HBO series True Detective, opposite Woody Harrelson and Matthew McConaughey.

Congrats to the family!

-Additional reporting by Marcus Mulick

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