Castle String Quartet are a diverse group of string players based in Dublin, and consists of Katie O’Connor (violin), Aoife Ní Dhornáin (violin/ viola), Úna O’Kane (violin/ viola) and Paula Hughes (cello).

Individually they work regularly with the RTÉ Concert Orchestra, National Symphony Orchestra, Ulster Orchestra and the Wexford Opera Festival Orchestra. No strangers to the contemporary Irish music scene, they have worked with many artists including U2, The Frames, The Corrs and Glen Hansard.