Iarla Ó Lionáird (born 1964) is an Irish singer and producer well known for his involvement with the Afro Celt Sound System. He is one of the most prominent artists of the Irish Sean nós singing tradition, and has released three solo albums through Real World Records, the third being Invisible Fields, released in August 2005, which was voted "Best Folk Record" by the Irish Times in 2006. He also sings on the Peter Gabriel album OVO.