First-time mom Fergie shared an adorable close-up picture of her baby boy Axl Jack via Twitter on Saturday, Sept. 21; "Hello world!!!" Credit: Courtesy of Fergie

Looks like someone has his father's looks! Proud mama Fergie shared a new adorable picture of her baby boy Axl Jack via Twitter on Saturday, Sept. 20. The close-up picture of Axl, born on Aug. 29, is a spitting image of dad Josh Duhamel.

"hello world!!!! #daddyandmommymademedothis #whatsahashtag," the first-time mom wrote. The Black Eyed Peas singer shared a photo of Axl bright-eyed and looking right into the camera. In the shot, he wears a white bib and shows off his light brown locks.

Fergie, 38, and Duhamel, 40, just can't contain their excitement with their new little one. On Tuesday, Sept. 17, the married couple of four years also shared separate photos of their new son via Facebook.

"Axl Jack Duhamel Day 1. Life is good ?#‎paparazziyoucanleaveourhousenow?" Duhamel wrote with Axl wrapped up in a blanket. 

On the second day, Fergie's precious moment showed Axl wearing a set of headphones. "Axl Jack Duhamel. Day 2 of life. Hearing test complete. All systems go. ?#‎chillin?" she wrote.