Once
- År: 2007
- Land: Ireland, United States of America
- Genre: Drama, Music, Romantik
- Studio: Samson Films, Summit Entertainment, RTÉ, Fís Éireann/Screen Ireland
- Nyckelord: rock 'n' roll, lovesickness, love of one's life, composer, pop, music instrument, lovers, dublin, ireland, recording studio, pianist, ireland, music store, street musician, songwriting, recording session, street singer, busking
- Direktör: John Carney
- Kasta: Glen Hansard, Markéta Irglová, Hugh Walsh, Gerard Hendrick, Alaistair Foley, Geoff Minogue