Gwen Stefani and Gavin Rossdale officially make the cutest babies.
We haven't seen much of little Apollo Bowie Flynn since his birth six months ago ... but the No Doubt singer brought him out in a big way on Thursday.
The adorable tot was her special guest at the U.S. Open in Queens, the cute kid looking a lot like the couple's other two children, Kingston and Zuma.
And speaking of those two, they may not have made it to the match physically but they were there virtually ... thanks to a Facetime session from Gwen's VIP seats.
The 44-year-old mom recently opened up about getting pregnant with Baby #3 -- and says it's all Kingston's fault.
"Kingston has a direct link to God, basically," she told Seth Meyers this week. "[He'd pray] 'Dear God, please let my mom have a baby. Please, God! Please let my mom have a baby.' I swear to you, he prayed every single night, and four weeks later, I was pregnant."
Sounds like Kingston gets what he wants!
Check out the gallery above to see more adorable celebrity kids.