UPDATE: Meghan, Harry Name Royal Newborn

Royal couple Meghan and Prince Harry revealed their newborn son to the public on Wednesday, with the proud new mother declaring him "a dream.''

The couple, known as the Duke and Duchess of Sussex, posed with their son for cameras at Windsor Castle -- the first in a lifetime of photo calls for the two-day-old baby, who is seventh in line to the throne.

Buckingham Palace has announced Prince Harry and his wife Meghan are calling their baby boy -- Archie Harrison Mountbatten-Windsor.

Harry cradled the apparently sleeping baby, wrapped in a white blanket and wearing a matching cap, in his arms.

Meghan declared motherhood to be "magic.'' She said the baby had "just been a dream.''

"He has the sweetest temperament. He's really calm,'' she said.

Harry quipped: "I wonder who he gets that from.''

Asked which parent the baby took after, Harry said it was too soon to tell.

The couple left the photo call to introduce the baby to his grandparents, Queen Elizabeth II and Prince Philip. The infant is seventh in line to the British throne and is the eighth great-grandchild of 93-year-old Elizabeth, Britain's longest reigning monarch.

Baby Sussex was born Monday at an as-yet-undisclosed location.

Family members have welcomed the new arrival, with Prince William saying on Tuesday he was "absolutely thrilled.''