Lance Edward Armstrong (born Lance Edward Gunderson on September 18, 1971) is an American (People of the United States) professional road racing cyclist (road bicycle racing) who is best known for winning the Tour de France a record seven consecutive times, after having survived testicular cancer. He is also the founder and chairman of the Lance Armstrong Foundation for cancer research and support. He currently rides for UCI ProTour team ctRadioShack.

In October 1996 he was diagnosed with testicular cancer, with a tumor that had metastasized (metastasis) to his brain and lungs. His cancer treatments included brain and testicular surgery and extensive chemotherapy, and his prognosis was originally poor. He went on to win the Tour de France each year from 1999 (1999 Tour de France) to 2005 (2005 Tour de France), and is the only person to win seven times, having broken the previous record of five wins, shared by Miguel Indurain, Bernard Hinault, Eddy Merckx and Jacques Anquetil.

In 1999, he was named the ABC (American Broadcasting Company) Wide World of Sports (Wide World of Sports (U.S. TV series)) Athlete of the Year. In 2000 he won the Prince of Asturias Award in Sports. In 2002, Sports Illustrated magazine named him Sportsman of the Year. He was also named Associated Press Male Athlete of the Year (Associated Press Athlete of the Year) for the years 2002-2005. He received ESPNs ESPY Award (ESPY Awards) for Best Male Athlete in 2003, 2004, 2005, and 2006, and won the BBC Sports Personality of the Year Overseas Personality Award in 2003. Armstrong retired from racing on July 24, 2005, at the end of the 2005 Tour de France, but returned to competitive cycling in January 2009, and finished third in the 2009 Tour de France.