"Fashion Star" mentor Jessica Simpson and fiancé, Eric Johnson, welcomed a boy named Ace Knute on June 30 in Los Angeles via scheduled C-section.

"Ace Knute (pronounced Ka-nute) Johnson has arrived! Mom and baby are doing great," her rep confirmed. “Jessica, Eric, and Maxwell are thrilled to welcome the new addition to their family."

The couple is already proud parents to daughter Maxwell, who celebrated her first birthday on May 1st.

Simpson, 32, let it slip during an appearance on “Jimmy Kimmel Live" in March that she was having a son. When discussing how her first pregnancy was easy in comparison to the second time around, she said: “The crazy thing is I never knew a wiener could make me nauseous!"

Sources tell omg! that Simpson and Johnson “won’t wait too long" to tie the knot now that she has given birth to little Ace.

"Jessica can’t wait to be Eric’s wife," source says.