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.
"Together with Prince Harry, William and Kate have taken a leading role in marking the 20th anniversary of Diana's death," the Associated Press reported. "Last week the royals toured the garden of their Kensington Palace home to remember the princes' mother and celebrate her contributions to their family and to the monarchy."