Before launching his solo project, Hannes Torssell built an impressive résumé behind the scenes, producing for artists including Swedish House Mafia and RL Grime while remixing songs for acclaimed Scandinavian artists. In 2024, he stepped into the spotlight as Killen., introducing a deeply personal sound built around emotional songwriting, driving electronic production, and melodic hooks. His debut EP, Highlight, earned widespread praise, BBC Radio 1 support, millions of streams, and multiple Spotify editorial placements. Since then, Killen. has continued his rapid ascent with releases like ONANON, Mojo, Naive, and High Like The Sky, earning a Swedish Grammy for Best Electronic Act and performing at festivals including Way Out West while expanding into North America. His music sits somewhere between ODESZA, Fred again.., and Barry Can’t Swim—melodic, uplifting, and emotionally resonant without losing its dance-floor energy.