Once, they call it. There’s a song by that name in the film, but the title could just as well be writer/director John Carney’s private joke about how often this premise can be expected to work: Two talented musicians, one of them very young and not yet famous; the other no longer young and probably as famous as he’s likely to become, meet cute on the streets of Dublin and spend a couple of days pining away for one another in song. Their songs. We get to watch Frames frontman Glen Hansard and Czech singer-songwriter Markéta Irglová perform them, live and for the most part, in their entirety. Risky, but it works, probably because of the two leads’ relative obscurity as musicians (in the U.S., at least) and their not-quite-total inexperience as actors, rather than in spite of it.

The same can be said for the shot-on-video picture’s threadbare production values. It looks like it probably cost less than a used Prius, and one suspects there’s a reason all of the “extras” in the Dublin street scenes keep looking at the camera. (Most of whatever they did spend probably went into making sure the all-important tunes were recorded and mixed properly.) All of this is a big help to those of us who are predisposed to come to a romance with more skepticism than we bring to a Die Hard sequel — we can’t help but be disarmed by the film’s modesty, in scope if not in theme.

Although Hansard and Irglova aren’t playing themselves, exactly, there’s a Prince-in-Purple Rain kind of thing happening here. But it’s weirder than that: Hansard and Irglová had co-written several of the songs heard in the film for last year’s The Swell Season album before they were both cast in the film. Carney’s original plan was to cast Batman villain and zombie-dodger Cillian Murphy in Hansard’s role. It’s hard to imagine how this could have worked: Trying to explain how a guy who looks like Murphy and sings like Hansard remains an unknown street musician in Dublin for 20 years would necessarily push the movie out of the realm of realism and into the realm of, at best, Elvisism — or far, far worse. In real life, Hansard’s band, the Frames, have had a strong following in Ireland—and who knows, maybe they’re huge in the Czech Republic, too—for a decade or so. Over here, well, let’s just say there was plenty of room to stretch out at their fine 9:30 Club appearance back in April.