[1] At age 15, he played in the Icelandic version of the musical Oliver!, and in 2008 won the TV talent show Bandið hans Bubba.

In 2011, he was nominated for Gríman theatrical Awards for his role as Riff Raff in The Rocky Horror Picture Show and a year later appeared in Les Misérables.

He has worked with various musicians from around the world including Steve Hackett from Genesis and Jon Anderson from Yes.

Eyþór performed on Steve Hackett's solo album and has been a member of the Icelandic 80's progressive rock band Todmobile since 2009 as one of two lead singers.

The band had been formed as a trio in the early 1990s around Þorvaldur Bjarni Þorvaldsson, a renowned vocalist, guitarist, and record producer in Iceland and throughout the years had seen many changes in line-up and revivals and comebacks.