Alexandre Dimitri Song Billong (born 9 September 1987), better known as Alex Song, is a Cameroonian professional footballer who plays for Rubin Kazan. He plays as a central or defensive midfielder, and can also play as a central defender. Originally a utility player on the fringes of the first team, Song quickly became an integral part of Arsenal's starting 11 during the 2008–09 pre-season, eventually leading to a €15 million transfer to Barcelona in 2012.