Jessica Simpson Welcomes Baby Boy Ace Knute Johnson With Fiancé Eric Johnson

1-year-old daughter Maxwell becomes a big sister as the couple welcome their second child together

Jessica Simpson is a mommy again!

The Fashion Star judge delivered her second child, a bouncing baby boy on Sunday, E! News confirms.

And according to Simpson's rep, she and her retired footballer fiancé Eric Johnson are over the moon about it.

The little boy was born in Los Angeles at Cedars-Sinai Medical Center via a scheduled C-section.

The newborn, named Ace Knute Johnson, joins 1-year-old big sister Maxwell in the duo's quickly expanding brood. The baby boy's middle name honors dad Eric's Swedish paternal grandfather, Knute Johnson, according to Us Magazine.

Jessica's dad, Joe Simpson, took to Twitter to reveal his excitement as well, sharing: "Very blessed to celebrate the birth of my new grandson."

The 32-year-old Simpson and the 33-year-old Johnson, a former NFL tight end for the New Orleans Saints, got engaged in November 2010 but have yet to pin down a wedding date.

Congrats to the happy couple!

PHOTOS: See Jessica Simpson and baby Maxwell out and about in New York City!