Katie Ledecky — American Athlete born on March 17, 1997,
Kathleen Genevieve Ledecky is an American competition swimmer, Olympic gold medalist, nine-time world champion, and current world record holder in multiple events. She is the current world record-holder in the 400-, 800-, and 1,500-meter freestyle. She also holds the fastest-ever times in the 500-, 1000-, and 1,650-yard freestyle events... (wikipedia)