Ellertsson is an Icelandic musician heavily influenced by blues music of various styles. He has been playing in a number of Icelandic bands, mostly blues and rock music, for years (Kentár Blues Band). He started started his solo project under the name of Ellertsson by realeasing the single Þorláksmessa, in December 2019, followed by Poor Boy and Loki Bundinn in the summer of 2020.