Iarla Ó Lionáird is an Irish singer and record producer. He sings in the traditional sean-nós style. He was a member of the Afro Celt Sound System and is a member of the Irish-American supergroup The Gloaming. He has recorded several solo albums for Real World Records. He appeared in the 2015 film Brooklyn) singing an a cappella version of the Irish song “Casadh an tSugain”.