SX are a Belgian indie pop/indie rock duo/group from Kortrijk. The band was founded in 2009 by keyboardist and guitarist Benjamin Desmet and vocalist and keyboardist Stefanie Callebaut. The duo is also joined by guitarist Sebastiaan Van den Branden and drummer Christophe Claeys.
In June 2009, the abnd won the Road2Fame challenge on the TMF TV Channel with the song Mister Lion. Three months later, they won the public's prize at the Westtalent talent show. In 2011, Studio Brussel, a Belgian radio channel, gave them the Vi.Be On Air award, which started their breakthrough in Belgium.
After releasing three new tracks and going on a short tour, the band settled in the studio and released their debut LP, Arche, in November of 2012. The follow up to the album, Alphabet, was released in November of 2016.