The Brief Pope Leo XIV turned 70 years old on Sunday. Pope Leo XIV turned 70 years old on Sunday and was given a hometown treat to celebrate. Leo was born Robert Francis Prevost on Sept. 14, 1955, in Chicago. On Saturday, President Donald Trump’s new ambassador to the Vatican, Brian Burch, who also has ties to the Chicago area, presented Pope Leo with a birthday cake from Portillo’s, according to Reuters. The childhood home of the new Pope Leo XIV is seen in Dolton, Illinois, on May 9, 2025.