Lucas Rio Jesser (born January 22, 2006), professionally known as jssr, is an American recording artist hailing from Austin, Texas. jssr began making music in May 2020, publishing his first releases to SoundCloud. jssr’s sound mixes a variety of different genres together—combining elements of EDM, pluggnb, R&B, soul, and underground music. In late 2022, jssr joined the underground rap collective Nephilim