Transcript for Royal Baby Watch: Waiting for the Official Announcement
Amy said the baby's announcement will be posted outside buckingham palace and that's where abc's lama hasan is and that crowd has been growing for hours. Reporter: Good morning to you, george. It's absolutely amazing, the excitement and anticipation is building and atmosphere is just brilliant. Take a look at the thousands gathering outside buckingham palace right now. They're here for the changing of the guard, but, boy, let me tell you when the news about william and kate's baby started spreading there was a buzz in the air, buzz of excitement because, after all, it is here at buckingham palace that the formal announcement will be made and also when the world finds out. Now, that notice may also include information, for example, when prince william was born, they described hip as having blue eyes and crying lustily. Now once william and kate have their baby, the bells at westminster abbey will ring, three hours of ringing, rob.
This transcript has been automatically generated and may not be 100% accurate.