An "It's a Baby Boy" banner is illuminated on the BT Tower in London on May 6, 2019, following the announcement that Britain's Meghan, Duchess of Sussex has given birth to a son. - Meghan Markle, the Duchess of Sussex, gave birth on Monday to a "very healthy" boy, Prince Harry announced. "We're delighted to announce that Meghan and myself had a baby boy early this morning -- a very healthy boy," a beaming Prince Harry said. (Photo by Daniel SORABJI / AFP)

An "It's a Baby Boy" banner is illuminated on the BT Tower in London on May 6, 2019, following the announcement that Britain's Meghan, Duchess of Sussex has given birth to a son. - Meghan Markle, the Duchess of Sussex, gave birth on Monday to a "very healthy" boy, Prince Harry announced. "We're delighted to announce that Meghan and myself had a baby boy early this morning -- a very healthy boy," a beaming Prince Harry said. (Photo by Daniel SORABJI / AFP)

An "It's a Baby Boy" banner is illuminated on the BT Tower in London on May 6, 2019, following the announcement that Britain's Meghan, Duchess of Sussex has given birth to a son. - Meghan Markle, the Duchess of Sussex, gave birth on Monday to a "very healthy" boy, Prince Harry announced. "We're delighted to announce that Meghan and myself had a baby boy early this morning -- a very healthy boy," a beaming Prince Harry said. (Photo by Daniel SORABJI / AFP)

TOPSHOT A combination of pictures shows the congratulatory banner message circling the BT Tower reading "Congratulations Harry and Meghan It's a Baby Boy!" in London on May 6, 2019, following the announcement that Britain's Meghan, Duchess of Sussex has given birth to a son. - Meghan Markle, the Duchess of Sussex, gave birth on Monday to a "very healthy" boy, Prince Harry announced. "We're delighted to announce that Meghan and myself had a baby boy early this morning -- a very healthy boy," a beaming Prince Harry said. (Photo by Daniel SORABJI / AFP)

An "It's a Baby Boy" banner is illuminated on the BT Tower in London on May 6, 2019, following the announcement that Britain's Meghan, Duchess of Sussex has given birth to a son. - Meghan Markle, the Duchess of Sussex, gave birth on Monday to a "very healthy" boy, Prince Harry announced. "We're delighted to announce that Meghan and myself had a baby boy early this morning -- a very healthy boy," a beaming Prince Harry said. (Photo by Daniel SORABJI / AFP)