Mariel Margaret Hamm was born on March 17, 1972, in Selma, Alabama, United States, to a teenage mother, Stephaine Hamm, and his biological father, Bill Hamm. Her sibling names are Garrentt Hamm, Caroline Hamm, Lovdy Hamm & Tiffany Hamm.  She married to Christian Corry in 1994-2002 & then married to Nomar Garciaparra in 2003 again. She has three children named Garrett Garciaparra, Ava Caroline Garciaparra & Grace Isbella Garciaparra.

Mia Hamm start her school life in Notre Dame Catholic School, she pass her college life in Lake Braddock Secondary School & complete her graduation from The University of North Carolina at Chapel Hill. Hamm finished college with a 94-and-1 record and was a two-time ACC Female Athlete of the Year. 

Hamm competed as a member of the United States national soccer team in four FIFA Women's World Cup tournaments: the inaugural 1991 in China, 1995 in Sweden, as well as 1999 and 2003 in the United States. She competed at three Summer Olympic Games: 1996 in Atlanta, 2000 in Sydney, and 2004 in Athens.

Mia Hamm was one of six children and had to wear special boots to correct her club foot growing up. She began playing soccer as a child and won four NCAA championships in five years while playing for the University of North Carolina at Chapel Hill. While in college, she took part in the 1991 FIFA Women's World Cup. Hamm finished college with a 94-and-1 record and was a two-time ACC Female Athlete of the Year.

Hamm made history, becoming the youngest woman selected to the national soccer team at the age of 15. She scored the game-winning goal in her first World Cup game and went on to win the entire tournament, defeating Norway, 2-1. Four years later, she led the team to a semifinal finish at the World Cup, and a year later, took gold in the 1996 Summer Olympics. In 1999, Hamm and the women's national team won their second World Cup.

Mia Hamm won her final gold medal at the 2004 Summer Olympics, announcing her retirement with Julie Foudy and Joy Fawcett following the tournament. Prior to leaving the game, she spent three seasons playing professional soccer in the U.S. with the Washington Freedom, winning the Founders Cup in the league's last season of operation.

The 1997 Sportswoman of the Year married former MLB player Nomar Garciaparra in 2003, and they have three children together. Hamm is an active philanthropist and founded the Mia Hamm Foundation to support families needing bone marrow transplants. During her career, she signed deals with international brands such as Gatorade, Nike, Pepsi and Mattel. Hamm, who wrote "Go For the Goal: A Champion's Guide to Winning in Soccer and Life", was inducted into the National Soccer Hall of Fame