AceShowbiz -

Another royal baby is on the way for Prince William and Kate Middleton, according to a new report. OK! magazine is the first to claim that the Duchess of Cambridge is pregnant with her third child, with an alleged palace insider saying that she's "expecting a baby girl in November."

"George & Charlotte Getting A Baby Sister," so the magazine announces. It further declares inside the issue, "Hear ye, hear ye. The Duke and Duchess of Cambridge have royally exciting news to share: Another baby girl is on the way!"

"Kate is about 15 weeks along,” reveals another source, who contends that Kate and Prince William "weren't necessarily trying" to have a third child, but "they weren't not trying, either." The alleged insider then claims the couple "haven't ruled out a fourth."

It's also said that the couple is planning to ask Prince Harry and his actress girlfriend Meghan Markle to be godparents. The mag asserts, "She'll likely start showing any minute," before maintaining Kate's "waiting to go public with the news until well after" her sister Pippa weds on Saturday, May 20.

But don't get too excited just yet, as the news of Kate's pregnancy turns out to be unofficial. Having reached out to Kensington Palace, Gossip Cop says that the spokespeople weren't even aware of the pregnancy story. They revealed there's nothing "official" about the article published by OK! magazine.