The first Indianapolis 500 was held in 1911, where Ray Harroun was declared the first winner, driving the Marmon Wasp. The race has been run annually since 1911 (with exceptions during World War I and World War II), and 73 drivers have been crowned champions of the 500-mile race over the course of 105 races (through 2021). The most race victories held by a single driver is four, which has been accomplished only by A. J. Foyt, Al Unser, Rick Mears, and Hélio Castroneves. The Indianapolis 500 has also drawn many international drivers to the Indianapolis Motor Speedway over the years, with 23 of the winners coming from outside of the United States, representing eleven separate countries. The most recent champion of the Indianapolis 500 is Hélio Castroneves, winner of the 2021 race.