Actor Josh Duhamel , 40, and Black Eyed Peas frontwoman Fergie, 38, welcomed their first child on Thursday, Aug. 29, their rep confirms to PEOPLE.

Son Axl Jack Duhamel weighed in at 7 lbs., 10 oz., the rep tells PEOPLE.

After announcing the pregnancy on Twitter, the reality of a baby on the way set in when Duhamel witnessed his wife’s first ultrasound.

It’s very exciting … [It’s] unlike anything you’ve ever seen. You’re like, ‘Wow, it’s mine,’” the dad-to-be said in February.

For her part, Fergie — who celebrated with two baby showers — joked the pregnancy was a long time coming as Duhamel wanted to start a family after the first date. “He’s going to be an amazing father. He’s got natural parenting instincts,” she told PEOPLE in April.

The parents-to-be tried to keep baby’s sex a secret, but during an appearance on LIVE with Kelly and Michael, Duhamel hesitated before picking out a blue onesie. They did, however, manage to keep their son’s name.

“Some people may not like it, some people may think it’s really cool, but we don’t really care — that’s why we’re not telling anybody,” Duhamel explained.

Source: People
Image: Richard Shotwell/INVISION/AP