Meghan Markle and Prince Harry announce their son's name: Archie Harrison Mountbatten-Windsor

Move over, Baby Sussex — Meghan Markle and Prince Harry’s son will now be known as Archie Harrison Mountbatten-Windsor.

Britain's Prince Harry and Meghan, Duchess of Sussex, during a photocall with their newborn son, in St George's Hall at Windsor Castle, Windsor, south England, Wednesday May 8, 2019. Baby Sussex was born Monday at 5:26 a.m. (0426 GMT; 12:26 a.m. EDT) at an as-yet-undisclosed location. An overjoyed Harry said he and Meghan are "thinking" about names. (Dominic Lipinski/Pool via AP)
Meghan Markle and Prince Harry introduced their son to the world on Wednesday. (Photo: Dominic Lipinski/Pool via AP)

Hours after the couple’s first child was born on Monday, May 6, new dad Prince Harry told reporters that he and the duchess had yet to decide on a name. Bookies in the U.K. revealed that Alexander, Arthur, Philip, and Spencer (a nod to Princess Diana, the former Lady Diana Spencer) were strong contenders.

Hours after introducing their son to the world with a photo call at Windsor Castle on Wednesday, the duke and duchess posted an Instagram announcing their boy’s name. The newborn is pictured meeting his great-grandparents, Queen Elizabeth II and Prince Philip, while Meghan’s mother, Doria Ragland, looks on. Ragland has been staying with the couple and their new arrival at their home in Windsor.

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