Arnar Grétarsson

Grétarsson started his career at Breiðablik, where he played for several years until 1997 when he joined Leiftur, where he played for one year. On 8 August 1997 he traveled to Greece and signed for AEK Athens, where he played for three seasons. After his contract expired in 2000, Arnar signed for Belgian club Lokeren, where he played until 2006, when he moved back to his homeland to play for Breiðablik again.

Arnar made his debut for Iceland in the famous 5–1 shock defeat of Turkey in a September 1991 friendly match. He has been capped 71 times for Iceland, scoring two goals. His last international match was an October 2004 World Cup qualifying match against Malta.

In 2009, Arnar was appointed assistant manager of Breiðablik. In April 2010, AEK Athens appointed him director of football. He left the club due to a reorganization of the club in the summer of 2012. In 2013, he was appointed sporting director with Belgian team Club Brugge. In late 2014 he was appointed as manager of Breiðablik ahead of the 2015 season. In a major reshake in the fall of 2022 he was appointed by Valur as their manager soon after he was sacked as manager of KA Akureyri, after having notable success as manager in the northern capital the Icelandic giants hope to bring stability to their setup.

His older brother, Sigurður, was also an Iceland international.