American competition swimmer who took home four gold medals at the 2012 London Games and broke the world record in the 4×100-meter medley relay.
She attempted to qualify for the 2008 Olympics at age 13.
She turned down a chance to turn pro in order to compete at the University of California, Berkeley.
She is an only child. In September 2018, she became engaged to Hayes Johnson.
She and Katie Ledecky became two of Team USA's best swimmers.