Victoria Beckham left Heathrow on route back to LA on Sunday as a family spokesman confirmed that she's expecting a longed-for daughter.
The little girl, due in July, is a sister for her and David's three sons.
Until now, the 36-year-old had insisted she didn't know her baby's sex.
But confirmation from their official rep came after the sports star let the cat out of the bag at a lunch for his team, LA Galaxy.
He said: "Obviously, we're very lucky to be expecting again, and this is the first time I'm going to say it: It's a little girl.
"We're still in shock. Obviously, having three boys, you kind of expect another one.
"So finding out a little girl is in there is surprising, but, obviously, we are over the moon."