Which song from the 2007 Irish musical film Once won the Oscar for Best Original Song?

The song from the 2007 Irish musical film Once that won the Oscar for Best Original Song was “Falling Slowly.”

Written and performed by Glen Hansard and Markéta Irglová, “Falling Slowly” is central to Once's story. Hansard plays an unnamed Dublin street musician known as Guy, while Irglová plays an unnamed pianist known as Girl. Their collaboration grows from a chance meeting into a creative and emotionally intimate partnership as they record songs together.

The song won Best Original Song at the 80th Academy Awards, held in 2008. Its victory helped bring international attention to the film's low-key, music-driven style and to the two musicians, who performed the song together at the ceremony. The movie's soundtrack became an important part of its success.

The Oscar nomination was briefly questioned because the song had appeared in other recordings and contexts before the film's release. Academy officials ultimately determined that it qualified because it had been written for Once. The film later inspired a successful stage musical.