Ashlee Simpson And Pete Wentz Welcome Baby Boy.

Well the rumors were right last night.

Ashlee Simpson-Wentz and husband Pete Wentz welcomed a son Thursday night, PEOPLE confirms.

Bronx Mowgli Wentz weighed 7 lbs., 11 oz., and was 20 1/2 inches long.

Congratulations to them both! I bet Ashlee is just as relieved as the rest of us that she finally pushed that thing out.

Last April Us Weekly broke the news that Simpson, 24, and Wentz, 29, were expecting.

“Carrying a child is the most inspiring, emotional, amazing experience of my life,” Simpson wrote on her MySpace page. “My weight and my pant size are the absolute last thing I am concerned about. I am only concerned with having a healthy pregnancy and a healthy baby.”

During her pregnancy, Wentz — whom she wed in May — doted on her, often fetching her No. 1 craving: green olives.

He said she wanted “green olives on everything! You always have to be ready.”

So what’s up with the crazy name Bronx Mowgli? PEOPLE has an idea.

… it’s just the latest demonstration of her Disney devotion.

While Simpson and husband Pete Wentz … haven’t yet discussed the inspiration behind the baby’s unique moniker, “Mowgli” is, of course, the lead character in Disney’s animated classic, The Jungle Book.