Vésteinn Hafsteinsson is an Icelandic former Olympic discus thrower who is now considered the most successful discus coach in the history of the sport. He represented his native country at 4 summer Olympic games and five world championships. As a coach he has worked with World and Olympic champion Gerd Kanter and Olympic silver medalist Joachim B. Olsen and is currently coaching Daniel Ståhl and Simon Pettersson the gold and silver medalists at the Tokyo Olympics. His athletes have won 19 international championships medals including five medals from in the Olympic Games. He has also been the Head Coach of the Icelandic Track and Field team and been voted Track and Field Coach of the year in both Denmark and Estonia.