July 28, 2014 02:00 PM

Ilya S. Savenok/FilmMagic

Amy Lee has someone new to wake her up: her baby boy!

The Evanescence frontwoman welcomed her first child with husband Josh Hartzler on Thursday, July 24, her manager confirms to PEOPLE.

“Our little cub, Jack Lion Hartzler, is here,” Lee, 32, captioned an Instagram photo snuggling her newborn son in the hospital.

“I have never known the depths of my heart till now. The world just exploded into technicolor.”

Jack was born at 7:51 a.m., weighing in at 7 lbs., 13 oz. and measuring 21 inches long, the rep tells PEOPLE.

The singer wed Hartzler, a therapist, in May 2007 and announced in January that they were expanding their family.

“Josh and I are expecting! I’m so happy!” she Tweeted at the time.

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— Anya Leon with reporting by Patrick Gomez.

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