A third royal is on the way.
Prince George and Princess Charlotte will greet a new little sibling soon. Kensington Palace announced the happy news by way of explaining why their mom canceled a planned public appearance.
It's a big week for the royals. Prince William and wife Catherine, Duchess of Cambridge, are sending George, 4, to school for the first time this week. Charlotte is 2.
No word on possible names but Diana is bound to be in the offing if the new baby is a girl.
