List of Famous people who are 51

Giuseppe Guerini is a retired Italian professional road bicycle racer. He was known throughout his career as a climbing specialist and had pronounced success in cycling's Grand Tour events. He completed six editions of the Tour de France, five Vuelta a España's and four Giro's, managing two third-place finishes in the 1997 and 1998 Giro d'Italia.

Teddy Sagi is a Cypriot-Israeli billionaire businessman, partially based in London. Sagi is the founder of the gambling software company Playtech and owner of London's Camden Market. His personal wealth is estimated at US$3.6 billion, with interests in real estate, gambling software, payments processing, and digital advertising.

Chen Xingdong is a Chinese former badminton player. He competed at the 1996 Summer Olympics in the mixed doubles event together with his partner Peng Xinyong. Chen was part of the Sichuan Sports Technology College team since 1984 and retired from the international tournament in 1997. In 1998, he was selected as a coach in Sichuan Province team and at the same year he join national team as a men's team coach. In early 2000, he focused as a mixed doubles coach.

Carlos Alberto de Oliveira Secretário is a Portuguese former professional footballer who played mainly as a right back, and most recently the manager of French club US Créteil-Lusitanos.