“Juno” screenwriter Diablo Cody gave birth to her first child Tuesday, Us Weekly reported.

Cody, 32, delivered the news of baby Marcello Daniel Maurio’s arrival via Twitter.

“We had our boy early this morning! Marcello Daniel Maurio, 7lbs, 2 oz, lightly mustachioed [sic],” the Oscar-winning writer tweeted Tuesday.

The “United States of Tara” creator and “Jennifer’s Body” writer has been married to Dan Maurio since 2009.

“She’s a great lady to make a fetus with,” Maurio said of his wife, according to E! News.

Maurio is a staffer at the late night comedy television show “Chelsea Lately.”