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Pupils at Alvaston Infant and Nursery School in Derby have been giving us their opinions on what William and Kate call their new arrival.
New mum Rebecca Jones, 20, from Market Harborough in Leicestershire and her partner, Chris, are the proud parents of a girl, born last weekend, which was the Duchess of Cambridge's due date.
Rebecca said that because her daughter was born around the same time as Kate's baby she will be watching the new Royal with a keen interest.
Aston Villa has offered its congratulations to Prince William and Kate Middleton following the birth of the royal baby boy.
William is an Aston Villa fan and the Premier League club has sent a replica kit for the new arrival.
New mums around the Midlands spent the day waiting and hoping their new arrivals might have the same birthday as the future monarch.
We went along to meet some of them.
A mother who has given birth in Nottingham on the day the Royal baby is born has spoken of her excitement at the occasion.
The Prince of Wales joked he was "very grateful indeed for the perfectly kind wishes about my rather slowly-approaching grandfatherhood".
Charles said during a visit to West Yorkshire, "Some of you may have realised that with grandfatherhood comes, in four months' time, old age pensionerhood".
The Prince added that he hoped he had "a long shelf-life".
Warning: This video contains flash photography:
Prince Charles laughed as a well-wisher shouted to him, "Congratulations Sir, it's triplets!"
As the Prince walked over to say hello, John Dowson joked, "I heard it on the radio".
Mr Dowson said afterwards, "He just laughed, he was really jolly. Everybody's so excited in the country for him".
Prince Charles looked perplexed when a bystander shouted "congratulations" to him during a visit to York Minster.
Charles appeared to say "Who? Me?" before chuckling as the woman explained the greetings were for the "imminent arrival".
As the Prince walked over to her, he joked, "Do you know something I don't?"
Prince Charles was given a gift for the upcoming addition to the royal family during his visit to York.
As he accepted the gift, Charles said the baby "hasn't quite appeared yet".
Alex Dickinson said her son Freddie "thinks [the baby] is going to appear in six hours time", to which the Prince replied, "You might be right".