Once is a 2007 Irish romantic musical drama film written and directed by John Carney. The film stars Glen Hansard and Markéta Irglová as two struggling musicians in Dublin, Ireland. Hansard and Irglová had previously performed music as the Swell Season, and composed and performed the film's original songs.
Once spent years in development with the Irish Film Board and was made for a budget of €112,000. It was a commercial success, earning substantial per-screen box office averages in the United States, and received acclaim from critics. It received awards including the 2007 Independent Spirit Award for Best Foreign Film. Hansard and Irglová's song "Falling Slowly" won the 2008 Academy Award for Best Original Song, and the soundtrack received a Grammy Award nomination.