The Olympic champions Usain Bolt and Allyson Felix have been named male and female athlete of the year respectively by the International Association of Athletics Federation at a ceremony in Barcelona.
Jamaican Bolt, who retained his 100 and 200 metres titles in London in August, is the first man to win the award four times, while American Felix was honoured for her gold medal in the 200 metres.
She was also part of the gold-winning US 4x100 metres relay team, which was awarded female performance of the year after smashing the world record set in 1985 by East Germany.
Felix beat New Zealand shot put gold medallist Valerie Adams for the award.
Kenyan David Rudisha won male performance of the year for his dazzling run in the 800 metres in London, when he also set a world record.
Trinidad and Tobago's javelin gold medallist Keshorn Walcott and sprinter Anthonique Strachan of Bahamas were named as the rising stars of 2012.