World celebrates prince's birth

The royal couple have been sent messages of congratulation from around the world. US President Barack Obama called the birth a "joyous occasion".

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Clinton: 'Congratulations from across the pond'

Former US Secretary of State Hillary Clinton has tweeted her congratulations to the Duke and Duchess of Cambridge:

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Niagara Falls lit up blue for royal birth

Niagara Falls has been lit blue to mark the royal birth. Credit: Niagara Parks/ Facebook

The Canadian side of the Niagara Falls has been lit up blue to celebrate the birth of the Duke and Duchess of Cambridge's son.

A message on the Niagara Parks Facebook page said: "It's a boy! We'll be lighting up Niagara Falls in a very ROYAL BLUE tonight and tomorrow night at 9, 10 and 11 p.m.

"Congrats to the royal couple!"

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