Singapore will soon get its fourth Prime Minister—and only the second outside of its founding family that has led the country for a combined more than 50 years since the city-state gained its independence in the 1960s. Prime Minister Lee Hsien Loong, 72, who has held the position since 2004, will relinquish his office on May 15, and 51-year-old Lawrence Wong—currently deputy prime minister and finance minister—will be sworn in as the country’s next premier, according to a statement Monday by the Prime Minister’s Office.