DJ Heartstring (stylised in all caps) are a German DJ and production duo, consisting of Jonas Hellberg and Leonard "Leo" Hans Victor Brede, formed in Berlin in 2021.
Both Brede and Hellberg began producing electronic music as teenagers, before meeting around 2017 through Brede's girlfriend. The duo released their debut EP "Destiny of the Moment" in 2021 through Union Trance Mission.
In June 2023, DJ Heartstring made their Boiler Room debut at AVA Festival, which achieved over 100k views in under a week. That same year, they were crowned as one of the BBC Radio 1 Future Dance Stars by Sarah Story.