And unlike the (many) times before that Kate's been rumored to be with child, this time there's an official announcement from the Palace:
"Their Royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting a baby," says the simple statement.
Unfortunately, she's also been admitted to hospital for "Hyperemesis Gravidarum," which the statement says is "very acute morning sickness which requires supplementary hydration and nutrients."
We wish Kate and Will the very best and hope the rest of Kate's pregnancy goes smoothly!
UPDATE: Looks like the world really has been waiting for this announcement, as the Royal website is now down!