The Duchess of Cambridge and husband Prince William welcomed their second child this morning at 8.34am. Their daughter weighs 8lbs 30z and Prince William was present for the birth.
Kensington Palace said both are "doing well" and Buckingham Palace have already formally confirmed the birth with the traditional easel on the forecourt.
From Cheryl Fernandez-Versini to Perez Hilton and TOWIE's Jessica Wright, see how the celebrities have reacted to the news:
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