Gwen Stefani is officially a mom to three boys!

The singer and her musician hubby Gavin Rossdale welcomed their third son, Apollo Bowie Flynn, on Friday (Feb. 28), the couple announced via Twitter.

Stefani posted in January that she was expecting another boy, who joins big brothers Kingston James McGregor, 7, and Zuma Nesta Rock, 5.

In his announcement, Rossdale explains that his son's multiple middle names, Bowie and Flynn, are the pair's mothers' maiden names.

Congrats to the new family of five!