UPDATE: It's a boy! Prince Harry says the couple is "absolutely thrilled" and thanks the public for their support. The baby weighed 7 pounds, 3 ounces at birth.
More from NBC News.
The Duchess of Sussex Meghan Markle has gone into labor, according to Buckingham Palace. The BBC says that this will be Queen Elizabeth's eight grandchild, and the prince or princess will be seventh in line to the throne.
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