Otto Jettmann (born 6 May 1989), better known by his stage name Otto Knows, is a Swedish DJ and music producer who has had a number of hits in Sweden, Belgium and the Netherlands and has collaborated with artists including Britney Spears, Avicii, Sebastian Ingrosso, Alesso and has made remixes for ATB, Imogen Heap and others. He is best known for his songs like "Starlight (Otto Knows Remix)", "Parachute" and "Million Voices"

Brought to the attention of Sebastian Ingrosso, thanks to a chance meeting in their native Stockholm, his development as a DJ and producer came through first hand experience of touring alongside the Refune head honcho. Debuting alongside none other than Tim Bergling, a.k.a. Avicii and Swedish peer Oliver Ingrosso, with their collaboration ‘iTrack’. Followed by his breakthrough single ‘Million Voices’, created in the back room of the studio whilst Ingrosso and Alesso penned festival favourite ‘Calling’. ‘Million Voices’ would propel the young producer forwards, proving a consistent favorite both across the airwaves and in clubs and setting the benchmark for his productions at an all-time-high. Receiving widespread attention ‘Million Voices’ crossed over into mainstream consciousness, topping the Shazam chart and being added to the prestigious A playlist at BBC Radio 1, reaching a surge of new fans with each airing. It has since charted in the top 15 in the UK singles chart and achieved gold in Australia, Ireland, the Netherlands, Sweden and Platinum in Belgium.