More than 18,000 people a minute tweeted about the royal baby as he made his first public appearance this evening, Twitter said.
The figure was short of peak of 25,300 tweets per minute which mentioned the baby last night after the birth was announced.
ITV News' Business Editor, Laura Kuenssberg, looks at how the royal baby could provide a much needed boost to the economy.
As news of the royal birth is celebrated around the globe a flood of souvenirs and memorabilia will go on sale to mark the occasion.
In London and around the world politicians, celebrities and members of the public have been celebrating the news of the royal birth.