Édouard Louis Joseph, Baron Merckx (born 17 June 1945), known as Eddy Merckx, is a Belgian former professional road and track cyclist racer who is the most successful rider in the history of competitive cycling. His victories include an unequalled eleven Grand Tours (five Tours de France, five Giros d'Italia, and a Vuelta a España), all five Monuments, setting the hour record, three World Championships, every major one-day race other than Paris–Tours, and extensive victories on the track.

Born in Meensel-Kiezegem, Brabant, Belgium, he grew up in Woluwe-Saint-Pierre where his parents ran a grocery store. He played several sports, but found his true passion in cycling. Merckx got his first bicycle at the age of three or four and competed in his first race in 1961.