Marta Károlyi is a renowned Romanian-American gymnastics coach, best known for her significant contributions to the sport. Born on September 29, 1942, in Romania, she initially trained as a gymnast before transitioning to coaching. Károlyi gained international fame for her work with the U.S. Women's National Gymnastics Team, leading them to numerous victories, including at the Olympic Games. Károlyi is particularly recognized for her role in developing elite gymnasts such as Mary Lou Retton and Simone Biles. Her coaching style emphasizes discipline and hard work, which has shaped the careers of many successful athletes. Károlyi's influence on gymnastics continues to be felt today.