He may be less than one month old, but Fergie and Josh Duhamel's baby boy is already the splitting image of his dad.

The Black Eyed Peas frontwoman tweeted a precious picture of Axl Jack on Saturday. The extreme close-up shot of the wide-eyed three-week-old is a striking mirror image of Josh. "hello world!!!! #daddyandmommymademedothis #whatsahashtag," she captioned the photo. Now, that's one happy baby!

The first-time parents also shared photos of their son on Facebook as soon as he was born. "Axl Jack Duhamel Day 1. Life is good ?#‎paparazziyoucanleaveourhousenow?" Duhamel wrote after posting a pic of his bundle of joy. Fergie shared another shot the next day with Axl wearing headphones. "Axl Jack Duhamel. Day 2 of life. Hearing test complete. All systems go. ?#‎chillin?" she wrote.