Phillips Olaosebikan Idowu, (born 30 December 1978) is a British athlete who specialised in the triple jump and was active at eleite level between 2000 and 2014. He is a former World Outdoor and Indoor, European Outdoor and Indoor, and Commonwealth triple jump champion. He was also a silver medalist at the 2008 Summer Olympics. Idowu is a member of the London-based Belgrave Harriers athletics club and has been for much of his career.

Despite his successes, Idowu has been at times accused of inconsistency and of failing to fulfil his potential, including his disappointing failure at the London Olympics 2012. His championship record since 2008, especially his gold medal at the 2009 World Athletics Championships, addressed some of these criticisms; the Olympic Games is the only major championship to have eluded him, with a silver medal in 2008.