PRINCE Harry and his wife Meghan have officially revealed the name they have given their first-born child.

In a statement posted on Instagram, the couple said: "The Duke and Duchess of Sussex are pleased to announce they have named their first born child: Archie Harrison Mountbatten-Windsor

"This afternoon Their Royal Highnesses introduced Her Majesty The Queen to her eighth great-grandchild at Windsor Castle.

"The Duke of Edinburgh and The Duchess' mother were also present for this special occasion."

Harry and Meghan shared pictures of their first photocall with their baby son on the @SussexRoyal Instagram account.

"The Duke and Duchess of Sussex are delighted to share their first public moment as a family." the post said.

"They are so incredibly grateful for the warm wishes and support they've received from everyone around the world, since welcoming their son two days ago."

Baby Archie was born on Monday morning and is seventh in line to the throne.

No mention was made of any royal title for him, with Harry saying after the birth that he and Meghan were "absolutely thrilled".