Jökull Júlíusson (born 20 March 1990) is an Icelandic singer-songwriter, best known as the lead singer of Kaleo.

The family returned to Mosfellsbær in 2004 and he finished his primary school education at Varmárskóli, where he met his future bandmates Davíð Antonsson and Daníel Ægir Kristjánsson.

[11] An avid football fan, he played for Sindri Höfn, TRIF and Afturelding's youth teams until the age of 16.

[7] After primary school, he founded the band Timburmenn along with Davíð Antonsson and Daníel Ægir Kristjánsson which performed mostly covers.

[12] In 2012, he founded Kaleo, along with Davíð, Daníel and Rubin Pollock, ahead of the Iceland Airwaves music festival.