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It's the name we have all been waiting for! The Duke and Duchess of Cambridge have revealed that their new baby boy is called Louis Arthur Charles.

Kate Middleton gave birth to a baby brother for Prince George and Princess Charlotte at 11:01am on Monday 23 April, but we did not know what he was called until now.

Kensington Palace said the Queen, the Duke of Edinburgh, the Prince of Wales, the Duchess of Cornwall, Prince Harry and members of both families were "delighted with the news" of the new arrival.

Little Louis is fifth in line to the throne - behind Prince Charles, Prince William, Prince George and Princess Charlotte - and is now the Queen's sixth great-grandchild.

How well do you know your royal babies - can you guess which is which? Why not have a go at our quiz!

I think that Louis should be the name of a French baby.

Louis, 12, Newcastle

I'm a girl so I'm not called any of those names. I don't think it's a very good name. I think Edward is a good name.

Amy, 11, North Yorkshire

I think he should of been called Henry or Harold.

Bailey, Leicestershire