The Eurovision Song Contest 2009 was the 54th edition of the Eurovision Song Contest. It took place in Moscow, Russia, following the country's victory at the 2008 contest with the song "Believe" by Dima Bilan. Organised by the European Broadcasting Union (EBU) and host broadcaster Channel One (C1R), the contest was held at the Olimpiysky Arena, and consisted of two semi-finals on 12 and 14 May, and a final on 16 May 2009. The semi-finals were presented by Russian model Natalia Vodianova and television presenter Andrey Malakhov, while the final was presented by Russian television presenter Ivan Urgant and former Russian contestant Alsou Abramova, becoming the first and to date only time that two different sets of presenters had hosted the semi-finals and finals.

The Eurovision Song Contest, often known simply as Eurovision, is an international song competition organised annually by the European Broadcasting Union. Each participating country submits an original song to be performed live and transmitted to national broadcasters via the Eurovision and Euroradio networks, with competing countries then casting votes for the other countries' songs to determine a winner.