Péter Biros is a Hungarian former water polo player, who played on the gold medal squads at the 2000 Summer Olympics, 2004 Summer Olympics and 2008 Summer Olympics, which makes him one of six male athletes who won three Olympic gold medals in water polo. He also competed at the 2012 Summer Olympics.

At the 2012 Summer Olympics Parade of Nations of the 2012 London Olympics, athletes and officials from each participating country paraded into the Olympic Stadium preceded by their national flag to the sound of iconic British modern music. Each flag bearer was chosen by each nation's National Olympic Committee or by the delegation of athletes.