Royal birth: UGC reaction from around the world
23 July 2013 Last updated at 16:21 BST
The Duchess of Cambridge gave birth to a boy on Monday at 16:24 BST weighing 8lbs 6oz.
Gun salutes in Green Park and the Tower of London and the ringing of bells at Westminster Abbey marked the birth of the third in line to the throne.
Kerry Alexandra from the BBC's User Generated Content team told the BBC's Tim Wilcox about the global reaction to the news of the birth on social media