The Duke and Duchess of Sussex have named their baby son Archie Harrison Mountbatten-Windsor, the couple announced on their Instagram account.

The Queen is expected to meet her new great grandson with the Duke and Duchess of Sussex on today, a source said.

Harry and Meghan are expected to take their baby to meet the Queen at Windsor Castle.

The Sussexes are also due to give the world its first glimpse of their two-day-old son in a photocall.

In his first public appearance, Baby Sussex was swaddled in a white merino wool shawl made by G H Hurt & Son.

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."

The post included one colour shot of the couple walking into St George's Hall, Windsor Castle, with Harry, carrying his son in his arms, and two black and white images of the family during their appearance, taken by Chris Allerton for @SussexRoyal.

Allerton was the couple's private wedding party photographer, and took the picture of the newlyweds watching fireworks in the grounds of Frogmore House at their evening reception.

The black and white image was used for their 2018 Christmas card.