Amy Lee of Evanescence

Amy Lee of Evanescence visits Fuse's "Top 20 Countdown" at KMA Studios on July 25, 2012, in New York City.

Robin Marchant/Getty Images

Evanescence's Amy Lee is a mother!

The rock singer gave birth to her first child with husband Josh Hartzler last Thursday.

Lee posted a picture of her newborn son, named Jack Lion, Monday afternoon on Instagram with the caption, "Our little cub, Jack Lion Hartzler, is here. I have never known the depths of my heart till now. The world just exploded into Technicolor." According to People, Jack Lion entered the world weighing 7 lbs., 13 oz.

Congrats, Amy!