Sveinn Rúnar Sigurðsson (born 24 December 1976) studied the piano under Ferenc Utassy, Jon Sigurdsson and Pavel Manazek. Since the age of 16 he has composed music in styles ranging from modern classics to pop. He composed two Eurovision Song Contest entries for his country, Iceland, 'Heaven' in 2004 and 'Ég les í lófa þínum' in 2007. He holds a degree in Medicine (M.D) and stock trading.
Sveinn first participated in the Icelandic national finals in 2003, with a song entitled "Með þér" performed by Guðrún Árný Karlsdóttir and Hjördís Elín Lárusdóttir (Dísella). In 2006 he had 3 entries in the national finals, "100% hamingja" performed by Aðalheiður Ólafsdóttir, "Útópía" performed by Hjördís Elín Lárusdóttir and "Mynd af þér" performed by Birgitta Haukdal. In 2007 he participated with 2 entries : "Draumur" performed by Hreimur Örn Heimisson which did not qualify for the national final and with "Ég les í lófa þínum" performed by Eiríkur Hauksson which took first place and represented Iceland in Helsinki under the name "Valentine Lost". Sveinn did not participate again until 2012 when he had 3 entries in the Icelandic finals : "Hugarró" performed by Magni Ásgeirsson, "Leyndarmál" performed by Íris Hólm and "Stund með þér" performed by Rósa Birgitta. In 2013 he participated again with three entries : "Ekki líta undan" performed by Magni Ásgeirsson, "Til þín" performed by Jógvan Hansen and Stefanía Svavarsdóttir and "Augnablik" performed by Erna Hrönn. In 2015 he participated once more with another entry titled "Augnablik" performed by Stefania Svavarsdóttir. In all, he has participated with a record number of 14 entries in the Icelandic national finals on a total of 7 occasions.
Sveinn rarely performs in public but amongst works he has either recorded or played in public are Grieg's Piano Concerto, Warshaw Concerto by Richard Addinsel, Chopin's Etudes Op. 25 and various Rachmaninoff works. In an interview in Istanbul, Turkey, he mentioned Rachmaninoff as his favourite composer. He partly works in Moscow and speaks Russian and Hungarian.
Sveinn is currently residing in Sweden and Norway.