Petra Marklund (born 12 September 1984 in Stockholm), better known by her stage name September, is a Swedish dance singer.

Marklund started recording music in studios at the age of 12. When she was 17, she sang in a rock band and gained a record deal. The songs were written and produced by Jonas von der Burg, Niclas von der Burg and Anoo Bhagavan.

September's first single from Dancing Shoes, "Can't Get Over" was released on American iTunes the week of 27 November 2007. In the Netherlands, the first single from Dancing Shoes was "Cry for You". This single peaked at number 4 in the Dutch top 40. September released "Can't Get Over" as her second single in the Netherlands where it peaked at number 35 on the singles chart. Her third single to be released in the Netherlands is "Until I Die" which has so far only peaked at number 91.

September released her 11th single "Because I Love You on November 19, 2008, A week before releasing her 3rd compilation album, September - Gold.