Hollie May Avil (born 12 April 1990) is an English former triathlete who was the European and World junior triathlon champion in 2007 and U23 World Champion in 2009. She is the youngest athlete ever to be on the podium at successive debut World Cup races and the youngest triathlete to have ever been ranked World Number One at only 18 years old. Still to this day, Avil is the youngest triathlete to have competed in the Olympic Games. In 2007 Avil was shortlisted for BBC Young Sports Personality of the year. In 2008, she was crowned British Olympic Association Triathlete of the Year.