Kate Middleton has been out and about these past few days and has been keeping a very big secret. It was announced on December 3, 2012, via the Associated Press that the Duchess of Cambridge is pregnant! This anticipated announcement has been years in the making and we can't wait to see how the beautiful Princess will dress up her soon-to-be baby bump. Congratulations to the Duke and Duchess of Cambridge!

According to the Associated Press, the Duchess of Cambridge has a severe form of morning sickness and is currently in a London hospital.

The palace said that since the pregnancy is in its "very early stages," the 30-year-old duchess is expected to stay in the hospital for several days and will require a period of rest afterward.

**UPDATE** The Duchess of Cambridge was released from the hospital on December 6, 2012. For details, click here.

Check out more pictures of Kate, William, and Pippa above!

Photo Credit: Getty Images