Leaders, celebrities react to royal birth

Published On: Jul 22 2013 05:37:34 PM EDT   Updated On: Jul 23 2013 02:53:57 PM EDT
William and Kate introduce royal baby 4

As news that Catherine, Duchess of Cambridge, had given birth to a boy, reactions quickly followed from the baby's family and political leaders around the world. And of course, plenty of celebrities weighed in on Twitter.