Catherine, the Duchess of Cambridge, has given birth to her third child with Prince William— a baby boy, whose name has not yet been released by the royal family. Kate Middleton gave birth to the 8-pound, 7-ounce baby boy at 11.01 a.m. U.K. time (6.01 a.m. ET), according to Kensington Palace. The newborn boy is a younger sibling to Prince George, 4, and two-year-old Princess Charlotte.