The Duke and Duchess of Cambridge have named their third child Louis Arthur Charles.
The couple’s second son was born at 11:01 BST on Monday at the Lindo Wing of St Mary’s Hospital in London, weighing 8lb 7oz.
A tweet from Kensington Palace confirmed the baby would be known as His Royal Highness Prince Louis of Cambridge.
The new prince is fifth in line to the throne.
Prince Louis Arthur Charles on the day he was born
Louis is one of the middle names of Prince William and of the new prince’s brother, George.
Arthur is also one of the duke’s middle names and was a middle name of King George VI – the Queen’s father.
The Duke and Duchess of Cambridge are delighted to announce that they have named their son Louis Arthur Charles.
The baby will be known as His Royal Highness Prince Louis of Cambridge. pic.twitter.com/4DUwsLv5JQ
— Kensington Palace (@KensingtonRoyal) April 27, 2018
Bookmakers had Arthur as the favorite name for the prince, followed by James and Philip.
On Thursday evening, Prince William told reporters that they were still deciding on a name, saying: “I’m working on that.”
Earlier in the week, he said Catherine and the baby were “in good form, luckily”, and added: “Sleeping’s going reasonably well so far, so he’s behaving himself, which is good news.”