Ágætis byrjun
Orri Páll Dýrason (; born on 4 July 1977) is an Icelandic musician. He was previously the drummer for Sigur Rós. He joined the band in 1999, shortly after the recording of the studio album "Ágætis byrjun", when the previous drummer, Ágúst Ævar Gunnarsson, left the band.