At the 2008 Summer Olympics, Milne ran in the first heat of men's 1500 metres, against ten other athletes, including Leonel Manzano of the United States, and New Zealand's Nick Willis, who eventually won the silver medal in the final. He finished the race in ninth place by approximately two seconds behind Reyes Estévez of Spain, outside his personal best of 3:41.56. Milne, unlike his two other teammates, failed to advance into the semi-finals, as he ranked below five mandatory qualifying slots for the next round.